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参数资料
| 型号： | PCA9534APWR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8 I/O, PIA-GENERAL PURPOSE, PDSO16 |
| 封装： | GREEN, PLASTIC, TSSOP-16 |
| 文件页数： | 2/41页 |
| 文件大小： | 985K |
| 代理商： | PCA9534APWR |
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A2
0
1
S
1
A1 A0 0
A
Data from Register
Slave Address
R/W
ACK From
Slave
Command Byte
ACK From
Slave
S
A2
0
1
A1 A0
R/W
1 A
Data
A
ACK From
Master
Data
Data from Register
NACK From
Master
NA P
Last Byte
ACK From
Slave
SCL
SDA
INT
Start
Condition
R/W
Read From
Port
Data Into
Port
Stop
Condition
ACK From
Master
NACK From
Master
ACK From
Slave
Data From Port
Slave Address
Data From Port
1
9
8
7
6
5
4
3
2
A2
0
1
S
1
A1 A0 1
A
Data 1
Data 4
A
NA P
Data 2
Data 3
Data 4
tiv
tph
tps
tir
Data 5
SCPS141F – SEPTEMBER 2006 – REVISED JUNE 2010
www.ti.com
Reads
The bus master first must send the PCA9534A address with the least-significant bit set to a logic 0 (see Figure 4
for device address). The command byte is sent after the address and determines which register is 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 then is sent by the PCA9534A (see Figure 8 and Figure 9). After
a restart, the value of the register defined by the command byte matches the register being accessed when the
restart occurred. Data is clocked into the register on the rising edge of the ACK clock pulse. There is no limitation
on the number of data bytes received in one read transmission, but when the final byte is received, the bus
master must not acknowledge the data.
Figure 8. Read From Register
<br/>
A.
This figure assumes that the command byte has previously been programmed with 00h.
B.
Transfer of data can be stopped at any moment by a stop condition.
C.
This figure eliminates the command byte transfer, a restart and slave address call between the initial slave address
call and the actual data transfer from the P Port. See Figure 8 for these details.
Figure 9. Read Input Port Register
10
Copyright 2006–2010, Texas Instruments Incorporated
Product Folder Link(s): PCA9534A
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相关代理商/技术参数 |
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| PCA9534APWR | 制造商:Texas Instruments 功能描述:I2CLogicInterfaceDeviceICs |
| PCA9534APWRG4 | 功能描述:接口-I/O扩展器 Remote 8B I2C & 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 |
| PCA9534ARGTR | 功能描述:接口-I/O扩展器 Remote 8B I2C and 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 |
| PCA9534ARGTRG4 | 功能描述:接口-I/O扩展器 Remote 8B I2C and 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 |
| PCA9534ARGVR | 功能描述:接口-I/O扩展器 Remote 8B I2C & 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 |
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