W83759A Datasheet, PDF (22/41 Pages) Winbond – ADVANCED VL-IDE DISK CONTROLLER

W83759A
CRX89h (PD0TIM1) Read/Write Primary Drive0 Timing Control 1
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
PD0AST1 PD0AST0 PD0DHT1 PD0DHT0 _PD0PRE
Bit 2
PD0DMA
Bit 1
Bit 0
PD0RDY ^PD0ADV
Bit 7−Bit 6
Bit 5−Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PD0AST1−0
PD0DHT1−0
PD0PRE
PD0DMA
PD0RDY
PD0ADV
PD0 Data Register Port (1F0h) Address Setup Time
Read/Write extra address setup time (clocks)
00
0
01
2
10
2
11
3
PD0 Data Register Port (1F0h) Data Hold Time
Read/Write extra data hold time (clocks)
00
0
01
2
10
2
11
3
Prefetch/Post write control
0
Prefetch/Post write enabled
1
Prefetch/Post write disabled
PD0 DMA mode control
0
DMA mode enabled
1
DMA mode disabled
PD0 Data Register Port (1F0h) IOCHRDY Control
0
IOCHRDY enabled
1
IOCHRDY disabled
PD0 Data Register Port (1F0h) Advanced Timing
Enable
0
Normal timing (depends on SP1, MD1, MD0
setting)
1
Advanced timing (depends on PD0TIM1−0
setting)
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