W91550DN SERIES

13-MEMORY TONE/PULSE DIALER

WITH LCD AND LOCK FUNCTIONS

Publication Release Date: November 1998

- 1 -

Revision A3

GENERAL DESCRIPTION

The W91550DN series are Si-gate CMOS IC tone/pulse switchable dialers containing 13 number
memories and a 10-digit LCD driver for displaying telephone numbers and calling time, including a
16-digit

3 one-touch memory, 16-digit

10 two-touch memory dialing, and 32-digit

2 redial and

save memory. These dialers also provide a secrecy key, flash, two-way handfree dialing, one-key
redial, hold and lock functions.

FEATURES

Tone/pulse switchable dialer

Two by 32-digit redial and save memory (or mercury memory)

Three by 16-digit one-touch direct repertory memory

Ten by 16-digit two-touch indirect repertory memory

Memory check function

Save/mercury function selected by pin option

Typical interdigit pause (IDP): 800 msec (10 ppS) in pulse mode

Uses 4

7 keyboard

Mute key for secrecy control

Minimum tone output duration/inter-tone pause: 87/87 mS

Flash pause time: 1.2 sec.

Flash break time (98, 300, 600 msec) selectable by keypad

Pause time (2.0, 3.6, 4.0 sec.) selectable by mask option

Pulse-to-tone (*/T) keypad for long distance call operation

0 or 9 dialing inhibition pin for PABX system or long distance dialing lock out

Make/break ratio selected by pin option

Built-in 10-digit LCD driver for telephone number display and calling time (1/3 duty, 1/2 bias)

Built-in calling time from (00:00) to (59:59)

On-chip power-on reset and clear LCD

On hook debounce: 250 msec in normal mode (20 msec in lock mode)

First key-in delay: 300 msec in lock mode

Uses 3.579545 MHz crystal or ceramic resonator

Packaged in 64-pin QFP

The different dialers in the W91550DN series are shown in the following table:

TYPE NO.

FUNCTION

PACKAGE

W91550DNF

Default pause time is 3.6 sec. and all F1, F2, F3 are first priority.

QFP

W91550DNF-1

Same as W91550DN except F3 can be stored as a digit.

QFP

W91550DNH

Default pause time is 3.6 sec. and all F1, F2, F3 are first priority.

Chip

W91550DNH-1

Same as W91550DN except F3 can be stored as a digit.

Chip

W91550DN SERIES

- 2 -

PIN CONFIGURATION

NO.

NAME

NO.

NAME

NO.

NAME

NO.

NAME

KMUTE

10C

COM3

DTMF

B/M

TEST

HPM MUTE

T/P

MUTE

HKS

ATS

HFI

HFO

MODE

LCD

COM1

10A

COM2

10B

LOCK

W91550DN SERIES

Publication Release Date: November 1997

- 3 -

Revision A3

PIN DESCRIPTION

SYMBOL

PIN

I/O

FUNCTION

Column,

Row

Inputs

The keyboard input may be used with either the standard 4

keyboard, an inexpensive single contact (form A) keyboard or
electronic input.

A valid key entry is defined by a single row being connected to a
single column.

XT,

54, 55

I, O A built-in inverter provides oscillation with an inexpensive

3.579545MHz crystal. Most crystals do not vary by more than 0.02%.

The oscillator oscillates in off-hook or handfree mode but oscillation
ceases in on-hook mode or when the handfree mode is released.

T/P

MUTE

The T/P

MUTE

is a conventional CMOS N-channel open drain

output. The output transistor is switched on during pulse and tone
mode dialing sequences and flash breaks. Otherwise, it is switched
off.

HPM MUTE

The HPM MUTE is a conventional CMOS inverter output. During
pulse dialing, flash break, hold, and mercury mute functions, this pin
will output an active high. Otherwise, it remains in a low state.

KMUTE

The

KMUTE

is a CMOS N-channel open drain output. The output

transistor is switched on only during the mute function. Otherwise, it is
switched off.

MODE

Pulling mode pin to V

places the dialer in tone mode.

Pulling mode pin to V

places the dialer in pulse mode.

Pulse or tone mode can be selected any time.

HKS

Hook switch input.

HKS

= V

: On-hook state. Chip in sleeping mode, no operation.

HKS

: Off-hook state. Chip enable for normal operation.

HKS

pin is pulled to V

by internal resistor.

This pin is a CMOS inverter output. The timing diagram is shown as

Figure 1(a), 1(b), 1(c), 1(d). Flash key will cause

to go active in

either pulse mode or tone mode.

W91550DN SERIES

- 4 -

Pin Description, continued

SYMBOL

PIN

I/O

FUNCTION

DTMF

In pulse mode, this pin remains in low state at all times.

In tone mode, it will output a dual or single tone. A detailed timing
diagram for tone mode is shown in Figure 2(a), 2(b), 2(c) 2(d).

Specified

Actual

Error %

Output Frequency

697

770

852

941

1209

1336

1477

699

766

848

948

1216

1332

1472

+0.28

-0.52

-0.47

+0.74

+0.57

-0.30

-0.34

38, 34

Power input pins.

B/M

Make: Break ratio select pin.

If B/M = V

, the M/B ratio is 40:60.

If B/M = V

, the M/B ratio is 33.3:66.7.

B/M pin is pulled to V

by internal resistor.

Save and mercury select pin.

If S/

= V

, the save function is selected.

If S/

= V

, the mercury function is selected.

pin is pulled to V

by internal resistor.

ATS

If ATS = V

, the auto timer function is enabled.

If ATS = V

, the auto timer function is disabled.

ATS pin is pulled to V

by internal resistor.

W91550DN SERIES

Publication Release Date: November 1997

- 5 -

Revision A3

Pin Description, continued

SYMBOL

PIN

I/O

FUNCTION

HFI

, HFO

57, 58

I, O Handfree control pins. A low pulse on the

HFI

input pin toggles the

handfree control state.

Status of the handfree control is listed in the following table:

CURRENT STATE

Input

HFO

Dialing

High

Yes

On Hook

High

Low

Off Hook

High

Low

Yes

On Hook

Off Hook

Low

Yes

Off Hook

Low

On Hook

Low

Off Hook

High

On Hook

High

Yes

Low

Hook SW.

HFO

HFI

NEXT STATE

HFI

pin is pulled to V

by internal resistor.

Detailed timing diagram is shown in Figure 4.

LOCK

The

LOCK

pin is used to prevent "0" or "9" dialing under PABX

system long distance call control. When the first key input after reset
is "0" or "9", all the key inputs, including "0" or "9" key, become
invalid, and the chip generates no output.

The telephone is reinitialized by a reset.

The following table describes the functions of the

LOCK

pin:

LOCK PIN

Floating

FUNCTION

Normal dialing

"0", "9" dialing inhibited

"0" dialing inhibited

TEST

In normal operation, pulling the

TEST

pin to V

inhibits the single

tone. In testing operation, pulling the

TEST

pin to V

enables a

single tone to be created by pressing two keys simultaneously, and all
of the timing parameters for pulse dialing are faster than in normal
operation.

LCD

Power supply pin for LCD driver.

A 1

F capacitor is connected between V

LCD

and V

CP, CN

60, 61

CP is the voltage control capacitor positive pin.

CN is the voltage control capacitor negative pin.

A 1

F capacitor is connected between these two pins.

W91550DN SERIES

- 6 -

Pin Description, continued

SYMBOL

PIN

I/O

FUNCTION

COM1

COM3

62, 63, 2

COM1

COM3 are common signal output terminals for the 1/3 duty

LCD.

1(A, B, C)

10(A, B, C)

(unless

26-pin)

1(A, B, C)

10(A, B, C) are 10-digit segment signal output terminals.

BLOCK DIAGRAM

ROW

COLUMN

DTMF

HKS

MODE

RAM

COUNTER

SYSTEM CLOCK

GENERATOR

LOCATION

LATCH

D/A

ROW & COLUMN

PROGRAMMABLE

COUNTER

DATA LATCH

& DECODER

COM1

COM2

COM3

BACKPLAN SIGNAL

GENERATOR

SEGMENT OUTPUT

DECODER

L.C.D.

READ/WRITE

B/M

TEST

ATS

HFI

(R1 ~ R4)

(C1 ~ C6)

HPM MUTE

T/P MUTE

HFO

KMUTE

CONTROL

LOGIC

PULSE

CONTROL

LOGIC

KEYBOARD

INTERFACE

CONVERTER

LOCK

S/M

W91550DN SERIES

Publication Release Date: November 1997

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Revision A3

FUNCTIONAL DESCRIPTION

Keyboard Operation

Vss

TIM

CHK

MUTE

R/P

SAVE

E: Store digit

CHK: a. Check dialing number

b. Memory check (except mercury)

A: Indirect repertory memory dialing function key

R/P: Redial and pause function key

/T:

in tone mode and P

T in pulse mode

M1 to M3: One touch memory

*SAVE: Save function key, If the S/

pin = V

MER, Mercury code dialing, If the S/

pin = V

TIM: Timer display key

F1, F2, F3: Flash keys

MUTE: Secrecy control key

H: Hold function key

R: One-key redial function

Notes:

D1, ..., Dn, D1', ..., Dn': 0, ..., 9,

/T, #

Mn: Direct memory location M1, M2, M3

Lm, Ln, Lp: Indirect memory location 0, ..., 9

Normal Dialing

OFF HOOK

(or

ON HOOK

HFI

¡õ

, ...,

1. D1, D2, ..., Dn will be dialed out.

2. Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits in normal dialing.

3. The dialing mark (the dot of digit_1) will be lit until dialing is finished.

Redialing

OFF HOOK

(or

ON HOOK

HFI

¡õ

, ...,

Busy

Come

ON HOOK

OFF HOOK

(or

ON HOOK

HFI

¡õ

R/P

W91550DN SERIES

- 8 -

a. The

R/P

key can execute the redial function only as the first key-in after off-hook; otherwise,

it will invoke the pause function.

b. The redial memory content will be D1, D2, D3, ..., Dn.

c. If redialing length oversteps 32 digits, the redialing function will be inhibited.

OFF HOOK

(or

ON HOOK

HFI

¡õ

, ...,

, Busy,

a. The one key redialing function timing diagram is shown in Figure 3.

b. If the dialing of

is finished, pressing the

key will cause the pulse output pin

to go low for 2.2 seconds break time and 0.6 seconds pause time will be added

automatically.

c. If the pulses of the dialed digits

have not finished,

will be ignored.

Number Store

OFF HOOK

, (or

ON HOOK

HFI

¡õ

, ...,

(many times

same as one time),

(or

, or

ON HOOK

D1, D2, ..., Dn will be stored in memory location Mn (or Ln) and will be dialed out.

OFF HOOK

, (or

ON HOOK

HFI

¡õ

, ...,

(could be skipped),

ON HOOK

OFF HOOK

(or

ON HOOK

HFI

¡õ

, ...,

(could be skipped),

ON HOOK

a. D1, D2, ..., Dn will be stored in memory location Mn (or Ln) but will not be dialed out.

b. R/P and */T

keys can be stored as a digit in memory, but

R/P key cannot be the first

digit. In store mode,

R/P is the pause function key.

c. The store mode is released after the store function is executed or when the state of the hook

switch changes or the flash function is executed.

OFF HOOK

, (or

, or

)

The redial content will be copied to memory location Mn (or Ln).

Save

If the S/

pin = V

, the save function is selected:

OFF HOOK

, (or

ON HOOK

HFI

¡õ

, D2

, ...,

, CONVERSATION,

D1'

D2'

, ...,

Dn'

SAVE

W91550DN SERIES

Publication Release Date: November 1997

- 9 -

Revision A3

D1', D2', ..., Dn' will be stored in save memory but will not be dialed out.

OFF HOOK

, (or

ON HOOK

HFI

¡õ

, ...,

SAVE

a. D1, D2, ..., Dn will be dialed out before the SAVE key is pressed.

b. The D1, D2, ..., Dn will be copied to save memory when the SAVE key is pressed after

D1, D2, ..., Dn dialing is finished.

OFF HOOK

, (or

ON HOOK

HFI

¡õ

SAVE

a. D1, D2, ..., Dn will be dialed out when the SAVE key is pressed.

b. All of the sequences will be displayed on the LCD.

Mercury

If the S/

pin = V

, the mercury function is selected:

OFF HOOK

, (or

ON HOOK

HFI

¡õ

, D2

, ...,

, CONVERSATION,

D1'

D2'

, ...,

Dn'

MER

D1', D2', ..., Dn' will be stored in mercury memory but will not be dialed out.

2. MERCURY memory content = D1', D2', ..., Dn'

OFF HOOK

, (or

ON HOOK

HFI

¡õ

, D2

, ...,

MER

D1, D2, ..., Dn will be dialed out but the MER's contents can't be dialed out.

OFF HOOK

, (or

ON HOOK

HFI

¡õ

MER

D1', D2', ..., Dn' will be dialed out, and the mercury mark (the dot of digit_10) will be blinking during
mercury dialing. Detailed timing diagram is shown in Figure 5.

c. The MER key can be used to execute the mercury function only when it is the first key-in in

dialing mode after off-hook state or first priority flash operation (except W91550DN-1's F3).

d. With the exception of the mercury mark, the contents of mercury memory will not be displayed

on the LCD.

e. Mercury memory cannot be checked in memory check mode.

Repertory Dialing

1. One-touch direct repertory dialing.

OFF HOOK

, (or

ON HOOK

HFI

¡õ

OFF HOOK

, (or

ON HOOK

HFI

¡õ

SAVE

(or

MER

)

2. Two-touch indirect repertory dialing.

OFF HOOK

, (or

ON HOOK

HFI

¡õ

W91550DN SERIES

- 10 -

Access Pause

OFF HOOK

(or

ON HOOK

HFI

¡õ

R/P

, ...,

1. The pause function can be stored in memory.

2. The pause function is executed in normal dialing, redialing, or memory dialing.

3. The pause function timing diagram is shown in Figure 6.

Pulse-to-tone (*/T)

OFF HOOK

(or

ON HOOK

HFI

¡õ

, ...,

*/T

D1'

, ...,

Dn'

1. If the mode switch is set to pulse mode, then the output signal will be:

D1, D2, ..., Dn, Pause (3.6 sec), D1', D2', ..., Dn'
(Pulse)

(Tone)

2. If the mode switch is set to tone mode, then the output signal will be:

D1, D2, ..., Dn, * , D1', D2', ..., Dn'
(Tone)

(Tone)

3. The dialer remains in tone mode when the digits have been dialed out and can be reset to pulse

mode only by going on-hook.

4. The pulse-to-tone function timing diagram is shown in Figure 7.

TIM

OFF HOOK

, (or

ON HOOK

HFI

¡õ

, D2

, ...,

(or

Redialing

Repertory dialing

), CONVERSATION,

TIM

1. If no key is pressed after dialing and ATS pin = 1, the LCD will automatically display counting time

after 6 seconds.

2. The timer will count after the TIM key is pressed from 00:00.

Flash (F = F1, F2, F3)

OFF HOOK

, (or

ON HOOK

HFI

¡õ

1. The dialer will execute flash break times of 600 mS (F1), 300 mS (F2), or 98 mS (F3) and a pause

time of 1.2 sec. before the next digit is dialed out.

2. The flash key cannot be stored as a digit in memory and it has the first priority among keyboard

functions (except for the F3 key of W91550DN-1).

3. The system will return to the initial state after pause time is finished.

4. Keyboard functions are inhibited during flash and when flash break is being executed.

5. The flash timing diagram is shown in Figure 8 and 12.

W91550DN SERIES

Publication Release Date: November 1997

- 11 -

Revision A3

Mute

OFF HOOK

, (or

ON HOOK

HFI

¡õ

MUTE

The MUTE is switched on and off by the mute key. The function timing diagram is shown in Figure 9.

Hold Key

OFF HOOK

, (or

ON HOOK

HFI

¡õ

1. The HOLD function is switched on and off by the hold key. When the hold function is toggled on,

the hold mark (dot of digit_6) will be lit. The function timing diagram is shown in Figure 10(a, b).

2. The HOLD key will be ignored during dialing.

Cascaded and Mixed Dialing

Cascaded Dialing

1. Definition of cascaded dialing:

In cascaded dialing, a new sequence may be pressed before the previous sequence has been sent
out completely. The following are examples of cascaded dialing:

Example 1:

Normal dialing

Repertory dialing 1

Repertory dialing 2

+...

Example 2:

Repertory dialing 1

Normal dialing

Repertory dialing 2

+...

Example 3:

Redialing

Normal dialing

Repertory dialing

+...

2. Normal dialing, redialing, or repertory dialing as represented by each rectangle above is treated as

one sequence.

3. At most 32 digits are allowed in cascaded dialing, but there is no limitation on the number of

sequences.

4. The content of cascaded dialing may a combination of normal dialing, redialing, and repertory

dialing. Redialing is valid only as the first key-in, however.

5. If

ON HOOK

OFF HOOK

is entered, then the cascaded dialing sequence described

in the examples above will be dialed out only if the total number of digits does not exceed 32. If the
sequence exceeds 32 digits then redialing is inhibited.

Mixed Dialing

1. Definition of mixed dialing:

The examples of cascaded dialing given above are also examples of mixed dialing except that in
mixed dialing a new sequence may be accepted only when the previous sequence has been dialed
out completely.

2. There is no limitation on the number of digits and sequences in the mixed dialing.

3. The content of mixed dialing may be a combination of normal dialing, memory dialing, or one-key

redialing.

W91550DN SERIES

- 12 -

4. If

ON HOOK

OFF HOOK

is entered, then the mixed dialing sequence described in

the above examples will be dialed out only if the total number of digits does not exceed 32. If the
total exceeds 32 digits, then redialing is inhibited.

Combining Cascaded and Mixed Dialing

1. Cascaded dialing and mixed dialing may be combined, and each follows the rules described above.

2. To apply redialing to combinations of cascaded and mixed dialing:

ON HOOK

OFF HOOK

, then redialing will be executed only if the total number of

digits does not exceed 32. Otherwise, the redialing is inhibited.

3. If there had been n cascaded sequences with a total of 30 digits dialed, then for the (n+1)th

cascaded sequence, one 2-digit normal dialing sequence or one complete repertory dialing
sequence (length up to 32 digits) can be dialed. The (n+2)th sequence will not be accepted for
cascaded dialing.

4. After a total of 32 digits of cascaded dialing have been completed, mixed dialing can be added.

ABSOLUTE MAXIMUM RATINGS

PARAMETER

SYMBOL

RATING

UNIT

DC Supply Voltage

-0.3 to +7.0

Input/output Voltage

-0.3

+0.3

-0.3

+0.3

Power Dissipation

120

Operating Temperature

OPR

-20 to 70

Storage Temperature

STG

-55 to 125

Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the

device.

DC CHARACTERISTICS

(

= 3V,

OSC

= 3.58

MHz

= 25

C, all

output

unloaded

)

PARAMETER

SYM.

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Operating Voltage

2.0

5.5

Operating Current

Tone, Unloaded

0.6

1.0

Pulse, Unloaded

0.4

0.8

Memory Retention Current

HKS

= V

, V

= 1.0V

0.5

W91550DN SERIES

Publication Release Date: November 1997

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Revision A3

DC Characteristics, continued

PARAMETER

SYM.

CONDITIONS

MIN.

TYP.

MAX.

UNIT

DTMF Output Voltage

Row

group, R

= 5 K

130

150

170

mVrms

Pre-emphasis

Col/Row, V

= 2.0

5.5V

DTMF Distortion

THD

= 5 K

= 2.0

5.5V

-30

-23

DTMF Output DC Level

TDC

= 5 K

= 2.0

5.5V

1.0

3.0

DTMF Output Sink Current

= 0.5V

0.2

Output Drive Current

= 2.0V

0.5

Output Sink Current

0.5V

0.5

Common Output Voltage

2.8

3.0

3.2

0.2

Common Output Current

COM

= 3.0V,

= V

COM

-0.4V

-20

COM

= 0.0V, V

= 0.4V

Segment Output Voltage

2.8

3.0

3.2

0.2

Segment Output Current

SEG

= 3.0V,

SEG

-0.4V

-5

SEG

= 0.0V, V

= 0.4V

RMS Voltage Across

2.0

2.12

Vrms

a Segment

OFF

1.225

1.35

Average DC Offset Volatge

100

T/P

MUTE

Output Sink

Current

TML

TPM

= 0.5V

0.5

HPM MUTE Output Sink
Current

HML

HPM

= 0.5V

0.5

KMUTE

Output Sink

Current

KML

= 0.5V

0.5

Control Input Pull-up/Down
Resistor

CIP

, B/M,

TEST

, ATS,

MODE,

HFI

100

HKS

Input Pull-up Resistor

HKS

300

500

Keypad Input Drive Current

= 0V

Keypad Input Sink Current

= 2.5V

200

400

Keypad Resistance

5.0

W91550DN SERIES

- 14 -

AC CHARACTERISTICS

PARAMETER

SYM.

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Key-in Debounce

KID

Key Release Debounce

KRD

Off-hook Delay

OFD

Lock only

300

First Key-in Delay

FKD

Lock only

300

On-hook Debounce

OHD

Normal mode

250

Lock mode

Pulse Mute Delay

B/M = V

33.3

Pre-digit-pause (10 ppS)

PDP

B/M = V

33.3

Interdigit Pause (Auto dialing)

IDP

10 ppS

800

Make/Break Ratio

M:B

B/M = V

40:60

B/M = V

33:67

Tone Output Duration

Auto dialing

Intertone Pause

ITP

Auto dialing

600

Flash Break Time

300

Flash Pause Time

F1, F2, F3

1.2

Mask option

2.0

Pause Time

(default 3.6S)

3.6

4.0

One-key Redialing Break Time

2.2

One-key Redialing Pause Time

0.6

LCD Frame Frequency

LCD

Notes:

Crystal parameters suggested for proper operation are R

100

= 96

0.02

pF,

5 pF,

18 pF,

and

OSC

= 3.579545 MHz

0.02%

Crystal oscillator accuracy directly affects these times.

W91550DN SERIES

Publication Release Date: November 1997

- 15 -

Revision A3

LCD DISPLAY FORMAT

A. Normal Dialing

Blinking

Off hook (or press "

HFI

" switch) (Here

tone mode was selected).

Dial "0123456789"

and "56".

Note: In tone mode the tone mark (the dot of digit_9) will be lit.

B. Redialing, Save Dialing, One Touch Dialing

Press the "R/P" or "R" or "SAVE" or "Mn"
key. (Redial or SAVE or Mn =
"1234567")

C. Mercury Dialing

Blinking

Press the "MER" key, the mercury mark
(the dot of digit_10) will be blinking.

W91550DN SERIES

- 16 -

D. Abbreviated Auto Dialing

Press the "A" key (L5 = "770066") in
handset mode.

Press the "5" key.

E. Memory Check

Blinking

Off hook or press the "

HFI

" switch (In

which case the handfree mode is
selected, and M3 = "035P770066").

Press the "CHK" key.

Press the "M3" key.

Note: In handfree mode the handfree mark (the dot of digit_7) will be lit.

Redial content

Off hook (or press "

HFI

" switch) press

"R/P" or "R".
(M1 = "1234567890123456")

Press the "CHK" key.

W91550DN SERIES

Publication Release Date: November 1997

- 17 -

Revision A3

Continued

Blinking

"M1" key.
(Display 1

10 digits)

"Any key" except "F1", "F2" and "F3"
keys.
(Display 11

16 digits)

F. Timer Function

Off hook (or press "

HFI

" switch), then

press the "TIM" key.
(Display last calling time)

"774926"

After dialing "774926", press the "TIM"
key.
(Timer will start counting up)

Press the "TIM" key (Timer will stop)

Off hook (or press the "

HFI

" key) dial

"774926"

W91550DN SERIES

Publication Release Date: November 1997

- 21 -

Revision A3

TIMING WAVEFORMS

HKS

KID

HPM MUTE

DTMF

OSC.

Low

OSCILLATION

PDP

T/P MUTE

IDP

KID

KEY IN

IDP

KRD

< 300mS

< 600mS

Figure 1(a). Normal Dialing Timing Diagram (Pulse Mode without Lock Function)

HKS

HPM MUTE

DTMF

OSC.

Low

OSCILLATION

T/P MUTE

KID

KEY IN

IDP

KRD

< 300mS

< 600mS

OFD

FKD

Figure 1(b). Normal Dialing Timing Diagram (Pulse Mode with Lock Function)

W91550DN SERIES

- 22 -

Timing Waveforms, continued

T/P MUTE

HKS

DTMF

OSC.

KEY IN

Low

OSCILLATION

HPM MUTE

IDP

M B

R/P

KID

IDP

M B

PDP

IDP

< 600mS

Figure 1(c). Auto Dialing Timing Diagram (Pulse Mode without Lock Function)

T/P MUTE

HKS

DTMF

OSC.

KEY IN

Low

OSCILLATION

HPM MUTE

R/P

KID

IDP

M B

IDP

M B

PDP

IDP

< 600mS

OFD

FKD

Figure 1(d). Auto Dialing Timing Diagram (Pulse Mode with Lock Function)

W91550DN SERIES

Publication Release Date: November 1997

- 23 -

Revision A3

Timing Waveforms, continued

T/P MUTE

HKS

HPM MUTE

DTMF

OSC.

Low

OSCILLATION

KID

KEY IN

High

ITP

KRD

KID

ITP

< 300mS

< 600mS

Figure 2(a). Normal Dialing Timing Diagram (Tone Mode without Lock Function)

T/P MUTE

HKS

HPM MUTE

DTMF

OSC.

Low

OSCILLATION

KEY IN

High

KRD

ITP

KRD

KID

ITP

< 300mS

< 600mS

FKD

OFD

Figure 2(b). Normal Dialing Timing Diagram (Tone Mode with Lock Function)

W91550DN SERIES

- 24 -

Timing Waveforms, continued

T/P MUTE

HKS

HPM MUTE

DTMF

OSC.

KEY IN

Low

OSCILLATION

KID

High

ITP

R/P

< 600mS

OHD

Figure 2(c). Auto Dialing Timing Diagram (Tone Mode without Lock Function)

T/P MUTE

HKS

HPM MUTE

DTMF

OSC.

KEY IN

Low

OSCILLATION

High

ITP

R/P

OHD

300mS

< 600mS

FKD

OFD

Figure 2(d). Auto Dialing Timing Diagram (Tone Mode with Lock Function)

W91550DN SERIES

Publication Release Date: November 1997

- 25 -

Revision A3

Timing Waveforms, continued

T/P MUTE

HKS

DTMF

OSC.

KEY IN

Low

OSCILLATION

HPM MUTE

KID

IDP

M B

PDP

IDP

Low

Figure 3. One-key Redial Timing Diagram

T/P MUTE

HKS

HFO

OSC.

HFI

HPM MUTE

High

OSC.

Low

OSC.

OHD

Figure 4. Handfree Timing Diagram

W91550DN SERIES

- 26 -

Timing Waveforms, continued

T/P MUTE

DTMF

HKS

OSC.

OSCILLATION

KEY IN

HPM MUTE

MCR

KID

PDP

IDP

ITP

Figure 5. Mercury Function Timing Diagram

KID

Low

OSCILLATION

PDP

IDP

R/P

T/P MUTE

HKS

HPM MUTE

DTMF

OSC.

KEY IN

Figure 6. Pause Function Timing Diagram (Pulse Mode)

W91550DN SERIES

Publication Release Date: November 1997

- 27 -

Revision A3

Timing Waveforms, continued

KID

OSCILLATION

PDP

IDP

ITP

*/T

T/P MUTE

DTMF

HKS

OSC.

KEY IN

HPM MUTE

Figure 7. Pulse-to-tone Timing Diagram

T/P MUTE

HKS

DTMF

OSC.

KEY IN

HPM MUTE

KID

Low

OSCILLATION

Low

IDP

KID

Figure 8. First Priority Flash Timing Diagram

W91550DN SERIES

- 28 -

Timing Waveforms, continued

KID

OSCILLATION

PDP

IDP

MUTE

KID

IDP

T/P MUTE

HKS

OSC.

KEY IN

HPM MUTE

KMUTE

Figure 9. Mute Timing Diagram

HKS

OFF HOOK

ON HOOK

HFO

HPM MUTE

CHIP ENBLE

Low

High

HFI

T/P MUTE

HOLD KEY

Figure 10(a). Hold Timing Diagram

Note: The HOLD KEY cannot be enabled when the chip is disabled.

W91550DN SERIES

Publication Release Date: November 1997

- 29 -

Revision A3

Timing Waveforms, continued

T/P MUTE

HFI

HKS

OFF HOOK

HFO

High

HPM MUTE

CHIP ENBLE

HOLD KEY

Figure 10(b). Hold Timing Diagram

Note: The HFI and HOLD KEY inputs will toggle the HFO signal; as soon as either HFI or HOLD KEY is activated, the HFO

signal will go high and previous activated inputs will be ignored.

T/P MUTE

HOLD KEY

HFI

HKS

ON HOOK

HFO

High

HPM MUTE

CHIP ENBLE

Figure 10(c). Hold Timing Diagram

Note: Changing the state of the HKS signal from high to low will initialize the HFO and HPM MUTE signals.

W91550DN SERIES

- 30 -

Timing Waveforms, continued

T/P MUTE

DTMF

HKS

KID

OSC.

OSCILLATION

PDP

IDP

KEY IN

HPM MUTE

< 300 mS

FKD

Figure 11. First Key-in Delay Timing Diagram

T/P MUTE

HKS

KID

DTMF

OSC.

Low

OSCILLATION

IDP

KEY IN

Low

HPM MUTE

IDP

Figure 12. Flash Timing Diagram for the F3 Key of W91550DN-1

W91550DN SERIES

Publication Release Date: November 1997

- 31 -

Revision A3

BONDING PAD DIAGRAM

(0, 0)

Notes:

1. The substrate must be connected to V

2. The chip size is 3010.00

3060.00

Unit:

PAD

NO.

PAD

NAME

PAD

NO.

PAD

NAME

KMUTE

-1234.60

1369.20

-1359.60

-1127.00

COM3

-1374.60

1322.70

-1359.60

-1281.50

-1359.60

1052.80

-1117.60

-1384.60

-1359.60

905.20

-970.00

-1384.60

-1359.60

741.40

-811.00

-1384.60

-1359.60

593.80

-658.60

-1384.60

-1359.60

430.00

-494.80

-1384.60

-1359.60

282.40

-342.40

-1384.60

-1359.60

118.60

-183.40

-1384.60

-1359.60

-29.00

-28.90

-1384.60

-1359.60

-192.80

128. 00

-1384.60

-1359.60

-340.40

280.40

-1384.60

-1359.60

-504.20

439.40

-1384.60

-1359.60

-651.80

587.00

-1384.60

-1359.60

-810.80

10A

746.00

-1384.60

-1359.60

-963.20

10B

898.40

-1384.60

W91550DN SERIES

- 32 -

Continued

PAD

NO.

PAD

NAME

PAD

NO.

PAD

NAME

10C

1062.20

-1384.60

1333.60

1338.10

1346.40

-1375.50

1034.10

1337.60

DTMF

1350.30

-1127.00

878.10

1337.60

B/M

1333.80

-819.50

705.10

1337.60

TEST

1328.80

-659.90

549.10

1337.60

1328.70

-519.90

363.00

1344.00

HPM MUTE

1340.90

-373.60

217.80

1354.20

T/P

MUTE

1340.90

-215.40

HKS

72.50

1352.90

ATS

1340.90

-79.30

HFI

-67.50

1352.90

1340.90

99.70

HFO

-202.50

1369.20

MODE

1340.90

270.70

LCD

-337.50

1369.20

1333.60

524.10

-447.50

1369.20

1333.60

680.10

-617.50

1369.20

1333.60

853.10

COM1

-757.50

1369.20

1333.60

1009.10

COM2

-908.20

1369.20

1333.60

1182.10

LOCK

-1052.60

1369.20

Headquarters

No. 4, Creation Rd. III,
Science-Based Industrial Park,
Hsinchu, Taiwan
TEL: 886-3-5770066
FAX: 886-3-5792766
http://www.winbond.com.tw/
Voice & Fax-on-demand: 886-2-27197006

Taipei Office

11F, No. 115, Sec. 3, Min-Sheng East Rd.,
Taipei, Taiwan
TEL: 886-2-27190505
FAX: 886-2-27197502

Winbond Electronics (H.K.) Ltd.

Rm. 803, World Trade Square, Tower II,
123 Hoi Bun Rd., Kwun Tong,
Kowloon, Hong Kong
TEL: 852-27513100
FAX: 852-27552064

Winbond Electronics North America Corp.
Winbond Memory Lab.
Winbond Microelectronics Corp.
Winbond Systems Lab.

2727 N. First Street, San Jose,
CA 95134, U.S.A.
TEL: 408-9436666
FAX: 408-5441798

Note: All data and specifications are subject to change without notice.

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: W91550DNH

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: W91550DNH