參數(shù)資料
型號: SAA7381
廠商: NXP SEMICONDUCTORS
元件分類: 消費家電
英文描述: ATAPI CD-R block decoder
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP144
文件頁數(shù): 36/108頁
文件大?。?/td> 380K
代理商: SAA7381
1
3
P
O
A
S
7.5.2.2
The SAA7381 host interface registers visible by the microcontroller
The registers listed in Table 56 are used by the microcontroller to control the operation of the host interface block. The ATAPI command block registers
(ADATA, ASTAT, ADRADR, ASAMT, ADRSEL, AINTR, AERR, ACMD, ADCTR, AFEAT and APCMD) are dual port registers which can be accessed
either by the microcontroller or the host PC depending the state of the BSY flag, bit 7 of the ASTAT register.
Table 56
Host registers as seen by the microcontroller
ADDR
ACCESS
NAME
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
FF80H
FF81H
W
RW
ADATA
IFCTRL
ATAPI Data register
ultra_
stopien
Data Byte Count register (bits 7 to 0)
Data Byte Count register (bits 15 to 8)
Data transfer Trigger register
Data Transfer Acknowledge register
reserved
ATAPI Status register (see Table 61)
host Interrupt Trigger register
ATAPI Drive Address register
ATAPI SAM tag register
dma
ultra_dma
cmdien
dteien
drqien
srstien
FF82H
FF83H
FF84H
FF85H
FF86H
FF87H
FF88H
FF89H
FF8AH
FF8BH
RW
RW
W
W
W
RW
W
W
RW
RW
DBCL
DBCH
DTRG
DTACK
RESET
ASTAT
ITRG
ADRADR
ASAMT
DTCTR
hsel
reserve
d
dmamode
rdrv
trant
FF8CH
FF8DH
FF8EH
FF8FH
FF90H
FF91H
FF92H
RW
RW
RW
R
R
R
RW
ADRSEL
AINTR
AERR
ACMD
ADCTR
AFEAT
IFSTAT
ATAPI Drive Select register
ATAPI Interrupt Reason register
ATAPI Error Register
ATAPI Command register
ATAPI Device Control Register
ATAPI Features register
ultra_stop
cmdi
dtei
drqi
dtbsy
srsti
reset08
a0comp/
crc_error
FF93H
FF94H
FF95H
FF96H
R
APCMD
HICONF0
HICONF1
HISEQ
ATAPI Packet Command register
dynhosthiprior
flushfifo
error
RW
RW
RW
ultractrl2 to ultractrl0
dmaen
shhpbit
autoa0
autodrq
hrequest
shadow
ultractrl3
udmaoff
comp
unmaskdtie
repeat
autoA0
clear_reg
sus_seq
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