W83759A
CRX8Ch (SD0TIM0)
Bit 7 Bit 6
Read/Write
Bit 5
Secondary Drive 0 Timing Control 0
Bit 4 Bit 3 Bit 2
Bit 1
Bit 0
SD0ACT3 SD0ACT2 SD0ACT1 SD0ACT0 SD0RCV3 SD0RCV2 SD0RCV1 SD0RCV0
Bit 7-Bit 4
Bit 3-Bit 0
SD0 Data Register Port (170h) Read/Write Active Time
Definition of these bits same as PD0ACT3- 0
SD0ACT3- 0
SD0RCV3- 0
SD0 Data Register Port (170h) Read/Write Recovery Time
Definition of these bits same as PD0RCV3- 0
CRX8Dh (SD0TIM1)
Read/Write
Secondary Drive 0 Timing Control 1
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SD0AST1
SD0AST0
SD0DHT1
SD0DHT0
SD0ADV
SD0PRE
SD0DMA
SD0RDY
Bit 7-Bit 6
SD0 Data Register Port (170h) Address Setup Time
Definition of these bits same as PD0AST1- 0
SD0 Data Register Port (170h) Data Hold Time
Definition of these bits same as PD0RDHT1- 0
SD0 Prefetch/Post write control
SD0AST1- 0
SD0DHT1- 0
Bit 5-Bit 4
Bit 3
SD0PRE
SD0DMA
0
1
Prefetch/Post write enabled
Prefetch/Post write disabled
Bit 2
Bit 1
Bit 0
SD0 DMA mode control
0
1
DMA mode enabled
DMA mode disabled
SD0 Data Register Port (170h) IOCHRDY Control
SD0RDY
SD0ADV
0
1
IOCHRDY enabled
IOCHRDY disabled
SD0 Data Register Port (170h) Advanced Timing Enable
0
Normal timing (depends on SP1, MD1, MD0
setting)
1
Advanced timing (depends on SD0TIM1- 0 setting)
- 24 -
WINBOND [ WINBOND ]
