参数资料
型号: PCA9575PW2,118
厂商: NXP Semiconductors
文件页数: 16/38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
23 of 38
NXP Semiconductors
PCA9575
16-bit I2C-bus and SMBus, level translating, low voltage GPIO
(1) Slave address shown in this example is for the 24-pin version.
Fig 15. Read from register
1000000
A
S0
START condition
R/W
acknowledge
from slave
002aad571
A
acknowledge
from slave
SDA
A
P
command byte
acknowledge
from master
data from register
DATA (first byte)
slave address(1)
STOP
condition
S
(repeated)
START condition
(cont.)
1000001
A
0
R/W
acknowledge
from slave
slave address(1)
at this moment master-transmitter becomes master-receiver
and slave-receiver becomes slave-transmitter
NA
no acknowledge
from master
data from register
DATA (last byte)
This gure assumes the command byte has previously been programmed with 00h.
Transfer of data can be stopped at any moment by a STOP condition.
(1) Slave address shown in this example is for the 24-pin version.
Fig 16. Read Input port register
1000001
A
S0
slave address(1)
START condition
R/W
acknowledge
from slave
002aad572
data from port
A
acknowledge
from master
SDA
1
no acknowledge
from master
read from
port
data into
port
data from port
DATA 1
DATA 4
INT
DATA 4
DATA 2
DATA 3
P
STOP
condition
tv(INT)
trst(INT)
th(D)
tsu(D)
12345678
SCL
9
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