參數(shù)資料
型號(hào): PCA9574PW,112
廠商: NXP Semiconductors
文件頁(yè)數(shù): 9/33頁(yè)
文件大?。?/td> 0K
描述: IC I/O EXPANDER I2C 8B 16TSSOP
標(biāo)準(zhǔn)包裝: 96
接口: I²C,SM 總線
輸入/輸出數(shù): 8
中斷輸出:
頻率 - 時(shí)鐘: 400kHz
電源電壓: 1.1 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 16-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 16-TSSOP
包裝: 帶卷 (TR)
包括: POR
其它名稱(chēng): 935285149112
PCA9574PW
PCA9574PW-ND
PCA9574
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 4 — 25 April 2012
17 of 33
NXP Semiconductors
PCA9574
8-bit I2C-bus and SMBus, level translating, low volage GPIO
Fig 14. Read from register
10000
A0
0
A
S0
START condition
R/W
acknowledge
from slave
002aad059
A
acknowledge
from slave
SDA
A
P
command byte
acknowledge
from master
data from register
DATA (first byte)
slave address
STOP
condition
S
(repeated)
START condition
(cont.)
10000
A0
1
A
0
R/W
acknowledge
from slave
slave address
at this moment master-transmitter becomes master-receiver
and slave-receiver becomes slave-transmitter
NA
no acknowledge
from master
data from register
DATA (last byte)
This figure assumes the command byte has previously been programmed with 00h.
Transfer of data can be stopped at any moment by a STOP condition.
Fig 15. Read Input port register
10000
A0
1
A
S0
slave address
START condition
R/W
acknowledge
from slave
002aad060
data from port
A
acknowledge
from master
SDA
1
no acknowledge
from master
read from
port
data into
port
data from port
DATA 1
DATA 4
INT
DATA 4
DATA 2
DATA 3
P
STOP
condition
tv(INT)
trst(INT)
th(D)
tsu(D)
2345678
SCL
9
1
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