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Z80 Datasheet(PDF) 192 Page - Zilog, Inc.

Part # Z80
Description  Z80 CPU PERIPHERALS
PDF  330 Pages
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Manufacturer  ZILOG [Zilog, Inc.]
Direct Link  http://www.zilog.com
Logo ZILOG - Zilog, Inc.

Z80 Datasheet(HTML) 192 Page - Zilog, Inc.

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7UGT /CPWCN
UM008101-0601
Direct Memory Access

Figure 81.
Write Register 5 Group
Figure 82.
Write Register 6 Group
D7 D6 D5 D4 D3 D2 D1 D0
Base Register Byte
0 = Ready Active Low
1 = Ready Active High
10
0
10
0 = StoponEnd-of-Block
1 = Auto Restart on End-of-Block
0 =CE Only
1 =CE/WAIT Multiplexed
D7 D6 D5 D4 D3 D2 D1 D0
Base Register Byte
0
1
11
1
=C3 = Reset
00
0
Hex Command Name
0
1
=C7=ResetPortA Timing
00
1
0
1
=C8=ResetPortB Timing
01
0
0
1
= CF = Load
01
1
0
1
= D3 = Continue
10
0
1
0
= AF = Disable Interrupts
01
1
1
0
= AB = Enable Interrupts
01
0
1
0
= A3 = Reset and Disable Interrupts
00
0
1
0
= B7 = Enable after RETI
10
1
1
0
= BF = Read Status Byte
11
1
0
0
= 8B = Reinitialize Status Byte
01
0
1
0
= A7 = Initialize Read Sequence
00
1
1
0
= B3= ForceReady
10
0
0
0
= 87 = Enable DMA
00
1
0
0
=83 = Disable DMA
00
0
1
0
= BB = Read Mask Follows
11
0
Base Register Byte
Status Byte
Byte Counter (Low Byte)
Byte Counter (High Byte)
Port A Address (Low Byte)
Port B Address (High Byte)
0
Port B Address (Low Byte)
Port A Address (High Byte)



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