參數(shù)資料
型號(hào)： 935275581118
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 8 I/O, PIA-GENERAL PURPOSE, PDSO16
封裝： 7.50 MM, LEAD FREE, PLASTIC, MS-013, SOT-162-1, SO-16
文件頁(yè)數(shù)： 3/33頁(yè)
文件大?。?/td> 316K
代理商： 935275581118
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2002
Nov
22
11
Philips
Semiconductors
Product
specication
Remote
8-bit
I/O
e
xpander
f
or
I
2C-b
us
PCF8574
handbook,
full
pagewidth
MBD975
S
0
1
0
A2
A1
A0
1
A
start condition
DATA 1
R/W
acknowledge
from slave
A
DATA 4
1
SDA
READ FROM
PORT
t ph
DATA INTO
PORT
slave address (PCF8574)
data from port
acknowledge
from slave
stop
condition
t ps
DATA 4
P
DATA 2
DATA 3
t ir
t iv
INT
Fig.12 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 last acknowledge phase is valid (output mode). Input data is lost.
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