Z80 datasheet(10/330 Pages) ZILOG

10 / 330 page

Z80 CPU Peripherals

User Manual

UM008101-0601

List of Figures

Direct Memory Access (continued)

Figure 24. Variable Cycle Length ....... ......... ......... ... 61

Figure 25. Pin Functions (CMOS PLCC Package Only) ....... ... 67

Figure 26. 40-Pin DIP Pin Assignments .. ......... ......... ... 68

Figure 27. 44-Pin PLCC Pin Assignments (Z8410 NMOS) ..... ... 69

Figure 28. 44-Pin PLCC Pin Assignments (Z84C10 NMOS) . . . . . . 70

Figure 29. Z80 DMA Block Diagram .... ......... ......... ... 71

Figure 30. Write Register Organization (left) and Read Register Organi-

zation (right) ..... ......... ......... ......... ... 74

Figure 31. Bus-Requesting Daisy-Chain . ......... ......... ... 79

Figure 32. Z80 Interrupt Sequence ...... ......... ......... ... 81

Figure 33. Interrupt Service Routine ..... ......... ......... ... 83

Figure 34. Interrupt Pending (IP) Latch .. ......... ......... ... 84

Figure 35. Interrupt Under Service (IUS) Latch ..... ......... ... 84

Figure 36. Interrupt On Ready (IOR) Latch ........ ......... ... 86

Figure 37. Interrupt Daisy-Chain ....... ......... ......... ... 88

Figure 38. Polling for a Service Request Bit ....... ......... ... 89

Figure 39. Write-Register Pointing Methods ....... ......... ... 92

Figure 40. Write Register 0 Group ...... ......... ......... ... 94

Figure 41. Write Register 1 Group ...... ......... ......... ... 96

Figure 42. Write Register 2 Group ...... ......... ......... ... 97

Figure 43. Write Register 3 Group ...... ......... ......... ... 99

Figure 44. Write Register 4 Group ...... ......... ......... .. 102

Figure 45. Write Register 5 Group ...... ......... ......... .. 104

Figure 46. Write Register 6 Group ...... ......... ......... .. 107

Figure 47. Read Register 0 through Read Register 6 . ......... .. 116

Figure 48. Z80/Z8000 Clock Driver ..... ......... ......... .. 129

Figure 49. Chip Enable Decoding with Z80 CPU ... ......... .. 131

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