参数资料
型号: PCA9538PW,118
厂商: NXP Semiconductors
文件页数: 2/34页
文件大小: 0K
描述: IC I/O EXPANDER I2C 8B 16TSSOP
产品培训模块: I²C Bus Fundamentals
特色产品: NXP - I2C Interface
标准包装: 1
接口: I²C,SM 总线
输入/输出数: 8
中断输出:
频率 - 时钟: 400kHz
电源电压: 2.3 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 16-TSSOP
包装: 标准包装
包括: POR
产品目录页面: 825 (CN2011-ZH PDF)
配用: 568-3615-ND - DEMO BOARD I2C
其它名称: 568-1840-6
PCA9538
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 6 February 2013
10 of 34
NXP Semiconductors
PCA9538
8-bit I2C-bus and SMBus low power I/O port with interrupt and reset
6.7 Bus transactions
Data is transmitted to the PCA9538 registers using the write mode as shown in Figure 7
and Figure 8. Data is read from the PCA9538 registers using the read mode as shown in
Figure 9 and Figure 10. These devices do not implement an auto-increment function so
once a command byte has been sent, the register which was addressed will continue to
be accessed by reads until a new command byte has been sent.
Expanded diagram is shown in Figure 18.
Fig 7.
Write to output port register
0
A
S
slave address
START condition
R/W
acknowledge
from slave
002aae708
0000001
0
command byte
A
acknowledge
from slave
12345678
SCL
9
SDA
DATA 1
A
write to port
data out from port
tv(Q)
acknowledge
from slave
DATA 1 VALID
data to port
1100
A1 A0
1
P
STOP
condition
Fig 8.
Write to configuration or polarity inversion registers
0
A
S
slave address
START condition
R/W
acknowledge
from slave
002aae709
000001 1/0
0
command byte
A
acknowledge
from slave
12345678
SCL
9
SDA
DATA 1
A
data to register
acknowledge
from slave
data to register
1100
A1 A0
1
P
STOP
condition
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