参数资料
型号: SN74ALS819DWR
厂商: TEXAS INSTRUMENTS INC
元件分类: 总线收发器
英文描述: ALS SERIES, 8-BIT DRIVER, TRUE OUTPUT, PDSO24
封装: PLASTIC, SO-24
文件页数: 10/12页
文件大小: 174K
代理商: SN74ALS819DWR
SN74ALS819, SN74ALS29818
8-BIT DIAGNOSTICS/PIPELINE REGISTERS
SDAS105A – JANUARY 1986 – REVISED OCTOBER 1986
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
7
Function Tables
SN74ALS819
INPUTS
OUTPUT AND I/O
MODE
SDI
SRCLK
ORCLK
SDO
Y0 – Y7
PE
DQ0 – DQ7
OPERATION OR FUNCTION
L
X
X
SR7
OUTPUT
HI-Z
Serial input, shift right
H
L
X
SDI
(L)
OUTPUT
INPUT
Parallel load shadow register from
DQ0 – DQ7
H
L
SDI
(L)
OUTPUT
INPUT
Parallel load shadow register and pipeline
register from DQ0 – DQ7
L
X
L
X
SR7
OUTPUT
INPUT
Load pipeline register from DQ0 – DQ7
L
X
SR7
OUTPUT
INPUT
Load pipeline register from DQ0 – DQ7 while
shifting shadow register
H
No
SDI
(H)
OUTPUT
Load pipeline register from shadow register
H
X
SDI
OUTPUT
Serial data in to serial data out
H
X
SDI
(H)
OUTPUT
HOLD
Hold shadow register, enable DQ0 – DQ7,
transitions on SRCLK ignored
L
X
L
X
SR7
OUTPUT
HI-Z
Disable DQ0 – DQ7 outputs
SN74ALS29818
INPUTS
OUTPUT AND I/O
OPERATION OR FUNCTION
MODE
OEY
SDI
SRCLK
ORCLK
SDO
Y0 – Y7
DQ0 – DQ7
OPERATION OR FUNCTION
L
X
X
SR7
HI-Z
Serial input, shift right, disable DQ0 – DQ7
H
L
X
SDI
(L)
INPUT
HI-Z
Parallel load shadow register from Y0 – Y7,
disable DQ0 – DQ7
H
L
No
SDI
(L)
OUTPUT
HI-Z
Parallel load shadow register from pipeline
register, disable DQ0 – DQ7
L
X
SR7
INPUT
Load pipeline register from DQ0 – DQ7
L
X
SR7
INPUT
Load pipeline register from DQ0 – DQ7 while
shifting shadow register
H
X
No
SDI
Load pipeline register from shadow register
H
X
SDI
Serial data in to serial data out
H
L
SDI
(L)
OUTPUT
HI-Z
Exchange data between registers,
DQ0 – DQ7 disabled
H
X
H
X
SDI
(H)
Hold shadow register, transitions on SRCLK
do not effect shadow register
H
X
H
X
SDI
(H)
OUTPUT
Enable DQ0 – DQ7 for parallel shadow
register output
The DQ0 – DQ7 outputs must be disabled before applying data to DQ0 – DQ7.
相关PDF资料
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