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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: 79/116頁
文件大小: 787K
代理商: W88227QD
Preliminary/Confidential
Subject to change without notice
W88227F/W88227QD
- 75 -
1999/10/1 Rev: 0.70
DTRCL/DTRCH - Data Transfer Ring Ceiling Register - (read/write 52h/53h)
Data Transfer Ring Base Register and Data Transfer Ring Ceiling Register treat the external memory as a ring
while transferring data to the host. Data Transfer Ring Base Register specifies the ceiling block number of
this ring. The first block to be transferred is specified by registers
TBH/L (25h/24h)
. The further data transfer
after the end of Data Transfer Ceiling block will access data in Data Transfer Base block.
WBRBL/WBRBH - Write Buffer Ring Base Register - (read/write 54h/55h)
Write Buffer Ring Base Register and Write Buffer Ring Ceiling Register treats the external memory as a ring
while buffering the serial data from DSP. Write Buffer Ring Base Register specifies the base block number of
this ring.
WBRCL/WBRCH - Write Buffer Ring Ceiling Register - (read/write 56h/57h)
Write Buffer Ring Base Register and Write Buffer Ring Ceiling Register treats the external memory as a ring
while buffering the serial data from DSP. Write Buffer Ring Base Register specifies the base block number of
this ring. The first block to be buffered is specified by registers
DDBH/L (29h/28h)
. Further serial data
buffering after the end of Write Buffer Ceiling block will buffer serial data into the Write Buffer Base block.
TCCCTL - TCC Source Control Register (read/write 58h)
This register is 00h after mater reset. This register controls the increment/decrement source of
TCC (9Dh).
Bit 7-4: reserved
Bit 3-2: TCCCTL[3:2]
TCCCTL[3:2]
Function
00h
TCC increment by CBK increment
default
01h
TCC increment by APBK increment
Bit 1-0: TCCCTL[1:0]
TCCCTL[1:0]
Function
00h
TCC decrement by TBK increment
default
01h
TCC decrement by APBK increment
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