參數(shù)資料
型號: SAA7381
廠商: NXP SEMICONDUCTORS
元件分類: 消費(fèi)家電
英文描述: ATAPI CD-R block decoder
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP144
文件頁數(shù): 44/108頁
文件大小: 380K
代理商: SAA7381
1997 Aug 12
44
Philips Semiconductors
Objective specification
ATAPI CD-R block decoder
SAA7381
7.5.3.20
HICONF0
This is the host interface configuration register 0
Table 72
HICONF0: address FF94H
Table 73
Description of the HICONF0 register bits
7.5.3.21
HICONF1
This is the host interface configuration register 1.
Table 74
HICONF1: address FF95H (see Table 75)
ACCESS
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
RW
ultractrl2 to ultractrl0
dynhosthiprior
hrequest
shadow
BIT
NAME
DESCRIPTION
7 to 5
4
ultractrl2 to ultractrl0
dynhosthiprior
ultra control bits (3 to 1), see Section 7.5.3.22
dynhosthiprior (1)
0 = N = Dynamic Host High Priority asserted when FIFO is
1
3
full
1 = N = Dynamic Host High Priority asserted when FIFO is
1
2
full
dynhosthiprior (0)
0 = (default) dynamic host high priority off
1 = dynamic host high priority on when FIFO bytes, N, off when > N
hrequest = 00; (default) assert host request when FIFO
2
3
full
hrequest = 01; assert host request when FIFO
1
2
full
hrequest = 10; assert host request when FIFO
1
3
full
hrequest = 11; assert host request when FIFO (full
2 bytes)
shadow enable: this bit controls whether shadowing of single drive
configurations is enabled
shadow = 1; enables shadowing for single drive configurations when the
SAA7381 is master and slave is non existent
shadow = 0; disables shadowing
3
dynhosthiprior
2 and 1
hrequest
0
shadow
ACCESS
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
RW
dmaen
shhpbit
udmaoff
flushfifo
unmaskdtei
clear_reg
ultractrl3
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