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參數資料
型號: W88113C
廠商: WINBOND ELECTRONICS CORP
英文描述: ATAPI CD-ROM DECODER & CONTROLLER
中文描述: ATAPI的CD - ROM解碼器
文件頁數: 46/102頁
文件大小: 573K
代理商: W88113C
W88113C
Publication Release Date: Mar. 1999
- 42 - Revision 0.61
MISS0 - Miscellaneous Status Register 0 - (read 2Eh)
Bit 5:
SRUb - Status Register Updated Flag
This bit becomes high when the ATAPI Status Register is updated by the following:
Microprocessor writes to 37h
Microprocessor triggers
DSCT (17h.w5)
Microprocessor triggers
SCT (17h.w0)
Automatic Status Completion occurs if
ASCEN (18h.5)
is enabled
Reception of A0h command if
APKTEN (18h.7)
is enabled
Chip reset or host reset
Bit 4:
MDRVF - Master Drive Flag
This bit is high if the drive is configured as Master. This bit is low if the drive is configured as
Slave.
Bit 3:
HINTF - Host Interrupt Flag
This bit reflects the status of the source of
pin HIRQ (47)
.
Bit 2:
nIEN - Bit nIEN in Device Control Register
This bit reflects the value of bit nIEN in ATAPI Device Control Register.
Bit 1:
PDIAGb - Pin PDIAGb Flag
This bit reflects the status of
pin PDIAGb (43).
Bit 0:
DASPb - Pin DASPb Flag
This bit reflects the status of
pin DASPb (37).
MISC1 - Miscellaneous Control Register 1 - (write 2Fh)
This register is 0 after chip reset.
Bit 7:
ARRC - ATAPI Register Read Control
When this bit is high, the ATAPI registers can be read regardless of the value of BSY if the
drive is selected.
Bit 6:
SARRC - Shadow Drive ATAPI Register Read Control
When this bit is high, the Shadow ATAPI registers can be read regardless of the value of BSY
if the shadow drive is selected.
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