Z80 datasheet(9/330 Pages) ZILOG

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Z80 CPU Peripherals

User Manual

List of Figures

UM008101-0601

List of Figures

Counter/Timer Channels

Figure 1.

CTC Block Diagram ..... ......... ......... ........3

Figure 2.

Channel Block Diagram . . ......... ......... ........4

Figure 3.

Z80 16-Bit Pointer (Interrupt Starting Address) .. ........8

Figure 4.

CTC Pin Configuration ... ......... ......... .......10

Figure 5.

Package Configuration ... ......... ......... .......10

Figure 6.

44-Pin Chip Carrier Pin Assignments . ......... .......11

Figure 7.

44-Pin Quad Flat Pack Pin Assignments ....... .......12

Figure 8.

Mode 2 Interrupt Operation ........ ......... .......23

Figure 9.

CTC Write Cycle ....... ......... ......... .......25

Figure 10. CTC Read Cycle ........ ......... ......... .......26

Figure 11. CTC Counting and Timing ......... ......... .......27

Figure 12. Interrupt Acknowledge Cycle ....... ......... .......29

Figure 13. Return from Interrupt Cycle ........ ......... .......30

Figure 14. Daisy-Chain Interrupt Servicing ..... ......... .......31

Direct Memory Access

Figure 15. Typical CPU I/O Sequence ......... ......... .......34

Figure 16. Conceptual Comparison of Various I/O Transfer Methods 39

Figure 17. Modes of Operation ..... ......... ......... .......42

Figure 18. Class of Operation ....... ......... ......... .......47

Figure 19. Basic Functions of the Z80 DMA .... ......... .......49

Figure 20. Transfer/Search One Byte . ......... ......... .......51

Figure 21. Byte Mode .... ......... ......... ......... .......52

Figure 22. Burst Mode ... ......... ......... ......... .......53

Figure 23. Continuous Mode ....... ......... ......... .......55

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