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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: 40/102頁
文件大小: 573K
代理商: W88113C
W88113C
Publication Release Date: Mar. 1999
- 36 - Revision 0.61
Chip reset or Host reset
This bit is also controlled by DASPS2 (3Fh.2), DASPS1 (3Fh.1) and DASPSS (3Fh.0).
CLRBSY - Clear BSY
Setting this bit high causes the flag BSY in the ATAPI Status Register to become low if
APKT
(30h.r0)
is not high. This bit is self-clear after the BSY is clear.
SETBSY - Set BSY
Setting this bit high causes the flag BSY in the ATAPI Status Register to become high if
APKT (30h.r0)
is not high. This bit is self-clear after the BSY is set.
SCoD - Select Command-Packet-FIFO or Data
The data received from ATAPI Data port is stored in Packet FIFO if this bit is high. This bit is
also controlled by
ADTT (17h.w2)
and
APKTEN (18h.7)
.
RDYEN - Pin IORDY Enable
Setting this bit high enables IORDY (pin 49) to work with HRDb (pin 50).
IO16EN - Pin IOCS16b Enable
Setting this bit high allows pin IOCS16b to become active-low when 16-bit data access is in
use. This bit should be enabled in normal operation.
Bit 4:
Bit 3:
Bit 2:
Bit 1:
Bit 0:
SICTL0 - Subcode Interface Control Register 0- (write 21h)
Bit 7-4: Reserved
Bit 3:
PQENB - P-data or Q-data Enable
Bits 7 and 6 of subcode data are written to the external RAM if this bit is low.
Bit 2-0: SUBCS[2:0] - Subcode Clock Select
These bits are used to select subcode clock rate.
SUBCS[2:0]
Disk Speed
Subcode Block
Rate
0
1 fold
75 sectors/sec
1
2 fold
150 sectors/sec
2
4 fold
300 sectors/sec
3
-
reserved
4
6 fold
450 sectors/sec
5
8 fold
600 sectors/sec
6
-
reserved
7
-
reserved
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