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參數資料
型號: W88227QD
廠商: WINBOND ELECTRONICS CORP
元件分類: 消費家電
英文描述: ATAPI CD-ROM Decoder(支持ATAPI標準的CD-ROM解碼器)
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP128
封裝: LQFP-128
文件頁數: 55/116頁
文件大小: 787K
代理商: W88227QD
Preliminary/Confidential
Subject to change without notice
W88227F/W88227QD
- 51 -
1999/10/1 Rev: 0.70
EVTRG - Event Trigger Register (write 16h)
The following bits will clear themselves after the triggered operation are completed. These bits should not be
set while
DECEN (0Ah.7)
is high to avoid conflict with normal Target increment on end of CRC-checking.
Bit 7-2: Reserved
Bit 2:
TARINC7 - Target Registers Increment 7 Trigger
Setting this bit high increments the
TARGET (84h-86h)
by 7.
TARINC - Target Registers Increment Trigger
Bit 1:
Setting this bit high increments the
TARGET (84h-86h)
by 1.
TARDEC - Target Registers Decrement Trigger
Bit 0:
Setting this bit high decrements the
TARGET (84h-86h)
.
ASTRG - Automatic Sequence Trigger Register (write 17h)
The following bits will clear themselves after the triggered operation are completed.
Bit 7:
Reserved
Bit 6:
CSRT - Clear Soft Reset Trigger
Setting this bit high clears bit SRST in the ATAPI Device Control Register.
Bit 5:
DSCT - Disk Seek Complete Trigger
If
ABYEN (18h.1)
is high, setting
DSCT
high triggers the following operations:
Set BSY
DSC (37h.4)
1
Clear BSY
If
ABYEN (18h.1)
is low, setting
DSCT
high sets DSC(37h.4) to 1.
SIGT - ATAPI Signature Trigger
Bit 4:
Setting this bit high initialize the Task Registers with ATAPI signature.
ATFEA (31h)
00h
ATERR (31h)
01h
ATINT (32h)
01h
ATSPA (33h)
01h
ATBLO (34h)
14h
ATBHI (35h)
EBh
ATSTA (37h)
x00x0000b
Note that register ATDRS (36h) is not cleared by triggering SIGT to abide by the ATAPI protocol.
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