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Table of Contents

Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Pins Common to Both the Z85230 and Z80230 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin Descriptions Exclusive to the Z85230 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pin Descriptions Exclusive to the Z80230 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Input/Output Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
ESCC Data Communications Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Z80230/Z85230 Enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4-Byte Transmit FIFO Buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8-Byte Receive FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Write Register 7 PRIME (WR7') . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
CRC Reception in SDLC Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
TxD Forced High in SDLC with NRZI Encoding When Marking Idle . . . . . . . . . . 27
Improved Transmit Interrupt Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
DPLL Counter Tx Clock Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Read Register 0 Status Latched During Read Cycle . . . . . . . . . . . . . . . . . . . . . . . . 28
Software Interrupt Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Fast SDLC Transmit Data Interrupt Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
SDLC FIFO Frame Status Enhancement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
FIFO Enable/Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
FIFO Read Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
FIFO Write Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
SDLC Status FIFO Anti-Lock Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Initializing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Write Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Read Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Z80230 Interface Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Z80230 Write Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Z80230 Read Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Z80230 Interrupt Acknowledge Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Z85230 Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Z85230 Read Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Z85230 Write Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Z85230 Interrupt Acknowledge Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

(QKDQFHG 6HULDO &RPPXQLFDWLRQV &RQWUROOHU

Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Standard Test Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Z85230 AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Z80230/Z85230 Errata . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

IUS Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
IUS Problem Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
RTS Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
RTS Problem Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Automatic TxD Forced High Problem Description . . . . . . . . . . . . . . . . . . . . . . . . 105
Automatic TxD Forced High Problem Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . 106
SDLC FIFO Overflow Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
SDLC FIFO Overflow Problem Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Default RR0 Value Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Default RR0 Value Problem Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Default RR10 Value Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Default RR10 Value Problem Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
CRC Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
CRC Problem Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Z85230 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Z80230 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Package Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Part Number Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

(QKDQFHG 6HULDO &RPPXQLFDWLRQV &RQWUROOHU

List of Figures

Figure 1.

Z85230 Pin Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Figure 2.

Z80230 Pin Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Figure 3.

Z85230 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Figure 4.

Z80230 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Figure 5.

ESCC Transmit Data Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 6.

ESCC Receive Data Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 7.

ESCC Interrupt Priority Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 8.

Various ESCC Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 9.

Detecting 5- or 7-Bit Synchronous Characters . . . . . . . . . . . . . . . . . . . . . . 17

Figure 10. SDLC Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 11. Data Encoding Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 12. Write Register 7 Prime (WR7') . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 13. DMA Request on Transmit Deactivation Timing . . . . . . . . . . . . . . . . . . . . 25

Figure 14. TxIP Latching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 15. DPLL Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 16. SDLC Frame Status FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 17. SDLC Byte Counting Detail 32

Figure 18. Z80230 Write Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Figure 19. Z80230 Read Cycle Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Figure 20. Z80230 Interrupt Acknowledge Cycle Timing . . . . . . . . . . . . . . . . . . . . . . 74

Figure 21. Read Cycle Timing (Z85230) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Figure 22. Write Cycle Timing (Z85230) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Figure 23. Interrupt Acknowledge Cycle Timing (Z85230) . . . . . . . . . . . . . . . . . . . . . 76

Figure 24. Standard and Open-Drain Test Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Figure 25. Z80230 Read/Write Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Figure 26. Z80230 Interrupt Acknowledge Timing Diagram . . . . . . . . . . . . . . . . . . . . 81

Figure 27. Z80230 Reset Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Figure 28. Z80230 General Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Figure 29. Z85230 Read/Write Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Figure 30. Z85230 Reset Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Figure 31. Z85230 Interrupt Acknowledge Timing Diagram . . . . . . . . . . . . . . . . . . . . 92

Figure 32. Z85230 Cycle Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Figure 33. Z85230 System Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

(QKDQFHG 6HULDO &RPPXQLFDWLRQV &RQWUROOHU

YLL

List of Tables

Table 1.

ESCC Write Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 2.

ESCC Read Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 3.

Data Encoding Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 4.

Z80230 Register Map (Shift Left Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table 5.

Z80X30 Register Map (Shift Right Mode) . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 6.

Z85230 Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Table 7.

Write Register 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table 8.

Write Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 9.

Write Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 10.

Write Register 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Table 11.

Write Register 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 12.

Write Register 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Table 13.

Write Register 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Table 14.

Write Register 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Table 15.

Write Register 7' . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Table 16.

Write Register 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Table 17.

Write Register 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Table 18.

Write Register 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Table 19.

Write Register 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Table 20.

Write Register 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Table 21.

Write Register 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Table 22.

Write Register 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Table 23.

Write Register 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Table 24.

Read Register 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Table 25.

Read Register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Table 26.

Read Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Table 27.

Read Register 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Table 28.

Read Register 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Table 29.

Read Register 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Table 30.

Read Register 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Table 31.

Read Register 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Table 32.

Read Register 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Table 33.

Read Register 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Table 34.

Read Register 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

(QKDQFHG 6HULDO &RPPXQLFDWLRQV &RQWUROOHU

YLLL

Table 35.

Read Register 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Table 36.

Read Register 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Table 37.

Read Register 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Table 38.

Read Register 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Table 39.

Read Register 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Table 40.

Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Table 41.

DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Table 42.

Z80230 General Timing Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Table 43.

Z80230 AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Table 44.

Z80230 System Timing Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Table 45.

Z85230 AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Table 46.

Z85230 General Timing Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Table 47.

Z85230 System Timing Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

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Document Outline

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: Z8523016VSG

Document Outline

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: Z8523016VSG