參數(shù)資料
型號: PCA9673D
廠商: NXP Semiconductors N.V.
元件分類: I2C/I2S
英文描述: Remote 16-bit I-O expander for Fm+ I2C-bus with interrupt and reset
封裝: PCA9673BQ<SOT815-1 (DHVQFN24)|<<http://www.nxp.com/packages/SOT815-1.html<1<Always Pb-free,;PCA9673BS<SOT616-1 (HVQFN24)|<<http://www.nxp.com/packages/SOT616-1.html<1&
文件頁數(shù): 12/33頁
文件大小: 283K
代理商: PCA9673D
PCA9673
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 2 — 29 September 2011
12 of 33
NXP Semiconductors
PCA9673
Remote 16-bit I/O expander for Fm+ I
2
C-bus with interrupt and 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 14. Write mode (output)
A5 A4 A3 A2 A1 A0
0
A
S A6
slave address
START condition
R/W
acknowledge
from slave
002aab632
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
t
d(rst)
P16 pull-up output current
INT
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 output current
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