参数资料
| 型号： | PCA9671D,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 33/33页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 16B 24SOIC |
| 产品培训模块： | LED Controllers I²C Bus Fundamentals |
| 特色产品： | NXP - I2C Interface |
| 标准包装： | 1 |
| 接口： | I²C |
| 输入/输出数： | 16 |
| 中断输出： | 无 |
| 频率 - 时钟： | 1MHz |
| 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： | 标准包装 |
| 包括： | POR |
| 产品目录页面： | 826 (CN2011-ZH PDF) |
| 其它名称： | 568-4192-6 |
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PCA9671
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 3 — 29 September 2011
9 of 33
NXP Semiconductors
PCA9671
Remote 16-bit I/O expander for Fm+ I2C-bus with reset
7.2.1 Software Reset
The Software Reset Call allows all the devices in the I2C-bus to be reset to the power-up
state value through a specific formatted I2C-bus command. To be performed correctly, it
implies that the I2C-bus is functional and that there is no device hanging the bus.
The Software Reset sequence is defined as following:
1. A START command is sent by the I2C-bus master.
2. The reserved General Call I2C-bus address ‘0000 000’ with the R/W bit set to logic 0
(write) is sent by the I2C-bus master.
3. The PCA9671 device(s) acknowledge(s) after seeing the General Call address
‘0000 0000’ (00h) only. If the R/W bit is set to logic 1 (read), no acknowledge is
returned to the I2C-bus master.
4. Once the General Call address has been sent and acknowledged, the master sends
1 byte. The value of the byte must be equal to 06h.
a. The PCA9671 acknowledges this value only. If the byte is not equal to 06h, the
PCA9671 does not acknowledge it.
If more than 1 byte of data is sent, the PCA9671 does not acknowledge any more.
5. Once the right byte has been sent and correctly acknowledged, the master sends a
STOP command to end the Software Reset sequence: the PCA9671 then resets to
the default value (power-up value) and is ready to be addressed again within the
specified bus free time. If the master sends a Repeated START instead, no reset is
performed.
The I2C-bus master must interpret a non-acknowledge from the PCA9671 (at any time) as
a ‘Software Reset Abort’. The PCA9671 does not initiate a reset of its registers.
The unique sequence that initiates a Software Reset is described in Figure 10.
Fig 10. Software Reset sequence
002aac281
0
A
S
0
SWRST Call I2C-bus address
START condition
R/W
acknowledge
from slave(s)
0
1
0
SWRST data = 06h
A
acknowledge
from slave(s)
P
PCA9671 is(are) reset.
Registers are set to default power-up values.
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相关代理商/技术参数 |
参数描述 |
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| PCA9671DB | 功能描述:接口-I/O扩展器 16-BIT I2C FM+ QB GPIO RST 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 |
| PCA9671DB,112 | 功能描述:接口-I/O扩展器 16-BIT I2C FM+ QB 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 |
| PCA9671DB,118 | 功能描述:接口-I/O扩展器 16-BIT I2C FM+ QB 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 |
| PCA9671DB-T | 功能描述:接口-I/O扩展器 16-BIT I2C FM+ QB GPIO RST 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 |
| PCA9671DK,118 | 功能描述:接口-I/O扩展器 16-BIT I2C FM+ QB 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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