参数资料
型号: PCA9539PW,118
厂商: NXP Semiconductors
文件页数: 3/37页
文件大小: 0K
描述: IC I/O EXPANDER I2C 16B 24TSSOP
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: 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-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 24-TSSOP
包装: 标准包装
包括: POR
产品目录页面: 825 (CN2011-ZH PDF)
其它名称: 568-1843-6
PCA9539_PCA9539R
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
11 of 37
NXP Semiconductors
PCA9539; PCA9539R
16-bit I2C-bus and SMBus low power I/O port with interrupt and reset
6.6.2 Reading the port registers
In order to read data from the PCA9539; PCA9539R, the bus master must first send the
PCA9539; PCA9539R address with the least significant bit set to a logic 0 (see Figure 5
“PCA9539; PCA9539R device address”). The command byte is sent after the address and
determines which register will be accessed. After a restart, the device address is sent
again, but this time the least significant bit is set to a logic 1. Data from the register
defined by the command byte will then be sent by the PCA9539; PCA9539R (see
Figure 9, Figure 10 and Figure 11). Data is clocked into the register on the falling edge of
the acknowledge clock pulse. After the first byte is read, additional bytes may be read but
the data will now reflect the information in the other register in the pair. For example, if you
read Input port 1, then the next byte read would be Input port 0. There is no limitation on
the number of data bytes received in one read transmission but the final byte received, the
bus master must not acknowledge the data.
Remark: Transfer can be stopped at any time by a STOP condition.
Fig 9.
Read from register
A
S
START condition
R/W
acknowledge
from slave
002aad727
A
acknowledge
from slave
SDA
A
P
acknowledge
from master
DATA (first byte)
slave address
STOP
condition
S
(repeated)
START condition
(cont.)
1101
A1 A0
1
A
1
R/W
acknowledge
from slave
slave address
at this moment master-transmitter becomes master-receiver
and slave-receiver becomes slave-transmitter
NA
no acknowledge
from master
COMMAND BYTE
1101
A1 A0
1
0
data from lower or
upper byte of register
LSB
MSB
DATA (last byte)
data from upper or
lower byte of register
LSB
MSB
相关PDF资料
PDF描述
ATTINY13A-MUR MCU AVR 1KB FLASH 20MHZ 20QFN
480142-3 CONN HOUSING 22POS W/MOUNT EARS
530521-7 HIGH CURRENT HSG 9 POS
480110-2 HSG AMP LEAF 15 POS
ATTINY13A-SNR IC MCU AVR 1KB FLASH 20MHZ 8SOIC
相关代理商/技术参数
参数描述
PCA9539PWE4 功能描述:接口-I/O扩展器 16-Bit I2C & SMBus Lo-Pwr I/O Expander 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
PCA9539PWG4 功能描述:接口-I/O扩展器 Rem 16B I2C & SMBus Low-Pwr I/O Exp 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
PCA9539PWR 功能描述:接口-I/O扩展器 16-Bit I2C & SMBus Lo-Pwr I/O Expander 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
PCA9539PWRE4 功能描述:接口-I/O扩展器 16-Bit I2C & SMBus Lo-Pwr I/O Expander 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
PCA9539PWRG4 功能描述:接口-I/O扩展器 Rem 16B I2C & SMBus Low-Pwr I/O Exp 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