pcf8574ats-3 NXP Semiconductors, pcf8574ats-3 Datasheet - Page 11
pcf8574ats-3
Manufacturer Part Number
pcf8574ats-3
Description
Remote 8-bit I/o Expander For I2c-bus
Manufacturer
NXP Semiconductors
Datasheet
1.PCF8574ATS-3.pdf
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A LOW-to-HIGH transition of SDA, while SCL is HIGH is defined as the stop condition (P). Transfer of data can be stopped at any moment by a stop condition. When this occurs, data present
at the last acknowledge phase is valid (output mode). Input data is lost.
READ FROM
DATA INTO
PORT
PORT
INT
SDA
start condition
t iv
S
0
slave address (PCF8574)
1
0
0
A2
A1
A0
t ph
R/W
1
Fig.12 READ mode (input).
A
acknowledge
from slave
DATA 2
t ir
data from port
DATA 1
DATA 3
t ps
A
acknowledge
from slave
t ir
data from port
DATA 4
DATA 4
1
condition
MBD975
stop
P
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