参数资料
型号: PCA9555D,112
厂商: NXP Semiconductors
文件页数: 34/34页
文件大小: 0K
描述: IC I/O EXPANDER I2C 16B 24SOIC
产品培训模块: I²C Bus Fundamentals
特色产品: NXP - I2C Interface
标准包装: 30
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: 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: 24-SOIC(0.295",7.50mm 宽)
供应商设备封装: 24-SO
包装: 管件
包括: POR
产品目录页面: 826 (CN2011-ZH PDF)
其它名称: 568-1056-5
568-3985-5
935269567112
PCA9555D
PCA9555_8
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 08 — 22 October 2009
9 of 34
NXP Semiconductors
PCA9555
16-bit I2C-bus and SMBus I/O port with interrupt
6.5 Bus transactions
6.5.1 Writing to the port registers
Data is transmitted to the PCA9555 by sending the device address and setting the least
signicant bit to a logic 0 (see Figure 8 “PCA9555 device address”). The command byte is
sent after the address and determines which register will receive the data following the
command byte.
The eight registers within the PCA9555 are congured to operate as four register pairs.
The four pairs are Input Ports, Output Ports, Polarity Inversion Ports, and Conguration
Ports. After sending data to one register, the next data byte will be sent to the other
register in the pair (see Figure 10 and Figure 11). For example, if the rst byte is sent to
Output Port 1 (register 3), then the next byte will be stored in Output Port 0 (register 2).
There is no limitation on the number of data bytes sent in one write transmission. In this
way, each 8-bit register may be updated independently of the other registers.
At power-on reset, all registers return to default values.
Fig 9.
Simplied schematic of I/Os
VDD
I/O pin
output port
register data
configuration
register
DQ
CK
Q
data from
shift register
write
configuration
pulse
output port
register
DQ
CK
write pulse
polarity inversion
register
DQ
CK
data from
shift register
write polarity
pulse
input port
register
DQ
CK
read pulse
input port
register data
polarity
inversion
register data
002aac703
FF
data from
shift register
FF
Q1
Q2
VSS
to INT
100 k
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PCA9555DB,112 IC I/O EXPANDER I2C 16B 24SSOP
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PCA9555D112 制造商:NXP Semiconductors 功能描述:IC I/O EXPANDER 16BIT 400KHZ SOIC-24
PCA9555D118 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述:
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PCA9555DB,112 功能描述:接口-I/O扩展器 I2C/SMBUS 16BIT GPIO RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel
PCA9555DB,118 功能描述:接口-I/O扩展器 16-BIT I2C FM TP GPIO INT PU RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel