參數(shù)資料
型號(hào): PCA9671DB
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: Remote 16-bit I/O expander for Fm+ I2C-bus with reset
中文描述: 16 I/O, PIA-GENERAL PURPOSE, PDSO24
封裝: 5.30 MM, PLASTIC, MO-150, SOT340-1, SSOP-24
文件頁(yè)數(shù): 13/34頁(yè)
文件大?。?/td> 183K
代理商: PCA9671DB
PCA9671_1
NXP B.V. 2006. All rights reserved.
Product data sheet
Rev. 01 — 20 December 2006
13 of 34
NXP Semiconductors
PCA9671
Remote 16-bit I/O expander for Fm+ I
2
C-bus with reset
8.3 Reading from a port (Input mode)
All ports programmed as input should be set to logic 1. To read, the master
(microcontroller) first addresses the slave device after it receives the interrupt. By setting
the last bit of the byte containing the slave address to logic 1 the Read mode is entered.
The data bytes that follow on the SDA are the values on the ports.
If the data on the input port changes faster than the master can read, this data may be
lost.
Fig 16. Write mode (output)
A5 A4 A3 A2 A1 A0
0
A
S A6
slave address
START condition
R/W
acknowledge
from slave
002aac250
P
06
1
P
07
data to port 0
A
acknowledge
from slave
1
2
3
4
5
6
7
8
SCL
9
SDA
A
acknowledge
from slave
write to port
data output from port
t
v(Q)
P05
data to port 1
data A0 and B0 valid
P16 output voltage
I
trt(pu)
I
OH
P16 pull-up ouput current
P
04
P
03
P
02
P
01
P
00
P
17
P
14
P
13
P
12
P
11
P
10
1
P16
P
15
t
v(Q)
DATA A0 AND B0 VALID
P05 output voltage
I
trt(pu)
I
OH
P05 pull-up ouput current
相關(guān)PDF資料
PDF描述
PCA9671DK Remote 16-bit I/O expander for Fm+ I2C-bus with reset
PCA9673 Remote 16-bit I/O expander for Fm+ I2C-bus with interrupt and reset
PCA9673DB Remote 16-bit I/O expander for Fm+ I2C-bus with interrupt and reset
PCA9673DK Remote 16-bit I/O expander for Fm+ I2C-bus with interrupt and reset
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