Datasheet

1999 Apr 07 10 Philips Semiconductors Product specification
Remote 16-bit I/O expander for I
2
C-bus
PCF8575
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MGL543
S 0 1 0 0 A2 A1 A0 1 A P07 P06 P05 P04
P07 to P00 P17 to P10P07 to P00 P17 to P10 P07 to P00 P17 to P10
P03 P02 P01 P00 P17 P10
R/W acknowledge
from slave
A A P07 P00 A P17 P10 1P
SDA
SCL
READ FROM PORT
t
h
DATA INTO PORT
INT
acknowledge
from receiver
acknowledge
from receiver
acknowledge
from receiver
non acknowledge
from receiver
t
su
t
ir
t
ir
t
iv
Fig.10 READ mode (input).
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 latest acknowledge phase is valid (output mode). Input data is lost.