参数资料
型号: PCA9575PW2,118
厂商: NXP Semiconductors
文件页数: 15/38页
文件大小: 0K
描述: IC I2C/SMBUS 16BIT GPIO 28TSSOP
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: 16
中断输出:
频率 - 时钟: 400kHz
电源电压: 1.1 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 28-TSSOP
包装: 标准包装
包括: POR
其它名称: 568-6647-6
PCA9575_3
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 9 November 2009
22 of 38
NXP Semiconductors
PCA9575
16-bit I2C-bus and SMBus, level translating, low voltage GPIO
9.
Bus transactions
Data is transmitted to the PCA9575 registers using ‘Write Byte’ transfers (see Figure 13
Data is read from the PCA9575 registers using ‘Read Byte’ transfers (see Figure 15 and
(1) Slave address shown in this example is for the 24-pin version.
Fig 13. Write to Output port register
0
A
S
slave address(1)
START condition
R/W
acknowledge
from slave
002aad569
0001010
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
100000
0
P
STOP
condition
(1) Slave address shown in this example is for the 24-pin version.
Fig 14. Write to Polarity inversion, Bus-hold enable, Pull-up/pull-down select, Conguration, Interrupt mask and
Interrupt status registers
0
A
S
slave address(1)
START condition
R/W
acknowledge
from slave
002aad570
0
XXXX
0
command byte
A
acknowledge
from slave
12345678
SCL
9
SDA
DATA
A
data to register
acknowledge
from slave
data to register
100000
0
P
STOP
condition
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