参数资料
型号: S1R72105F00A000
元件分类: 总线控制器
英文描述: SCSI BUS CONTROLLER, PQFP100
封装: 0.50 MM PITCH, PLASTIC, QFP15-100
文件页数: 38/99页
文件大小: 666K
代理商: S1R72105F00A000
S1R72105 Technical Manual
Rev.1.0
EPSON
37
7.3.39
FIFO Control (FIFOCTL)
R/W
Used for clearing the SCSI-FIFO data and for checking its status.
Address
Register Name
Bit Symbol
Description
31h
FIFOCTL
7: -
6: -
5: -
4: -
3: -
2: FCLR
CLEAR FIFO
1: FULL
FIFO FULL
0: EMPTY
FIFO EMPTY
BIT7,6,5,4,3 RESERVED
BIT2 CLEAR FIFO
Setting this bit to HIGH clears data stored in SCSI-FIFO.
The bit returns to LOW automatically after clearing.
BIT1 FULL
When this bit is HIGH it means that SCSI-FIFO is full. In this state, any data written into SCSI-FIFO is ignored.
BIT0 EMPTY
When this bit is HIGH it means that SCSI-FIFO is empty. In this state, any attempt to read data from SCSI-FIFO
results in invalid data read out.
7.3.40
FIFO Data (FIFODATA)
R/W
This register allows access to SCSI-FIFO from the CPU.
Address
Register Name
Bit Symbol
Description
32h
FIFODATA
7: FD7
(MSB)
6: FD6
5: FD5
4: FD4
SCSI_FIFO data
3: FD3
2: FD2
1: FD1
0: FD0
(LSB)
7.3.41
Non DMA Transfer Size (NDMASIZ)
R/W
This register sets the number of bytes of data transfer in Non-DMA mode. In Read mode, the register allows
to read out the size of data yet to be transferred.
Address
Register Name
Bit Symbol
Description
33h
NDMASIZ
7: NSZ7
(MSB)
6: NSZ6
5: NSZ5
4: NSZ4
Non DMA Transfer Size
3: NSZ3
2: NSZ2
1: NSZ1
0: NSZ0
(LSB)
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