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參數(shù)資料
| 型號： | 935270674118 |
| 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： | 3.90 MM, PLASTIC, MS-012, SOT-109-1, SO-16 |
| 文件頁數(shù)： | 3/20頁 |
| 文件大小： | 153K |
| 代理商： | 935270674118 |
Philips Semiconductors
Product data
PCA9557
8-bit I2C and SMBus I/0 port with reset
2002 Dec 13
11
00
1
A2
A1
A0
READ FROM
PORT
DATA INTO
PORT
SDA
S1
A
DATA 1
DATA 4
slave address
data from port
start condition
R/W
acknowledge
from slave
acknowledge
from master
stop
condition
tps
DATA 4
DATA 2
P
DATA 3
tph
SW00799
no acknowledge
from master
NA
NOTES:
1. This figure assumes the command byte has previously been programmed with 00h.
2. 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.
Figure 16. READ input port register
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