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參數(shù)資料
| 型號： | PCA9574PW,112 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 31/33頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 16TSSOP |
| 標準包裝： | 96 |
| 接口： | I²C，SM 總線 |
| 輸入/輸出數(shù)： | 8 |
| 中斷輸出： | 是 |
| 頻率 - 時鐘： | 400kHz |
| 電源電壓： | 1.1 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-TSSOP |
| 包裝： | 帶卷 (TR) |
| 包括： | POR |
| 其它名稱： | 935285149112 PCA9574PW PCA9574PW-ND |
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PCA9574
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 4 — 25 April 2012
7 of 33
NXP Semiconductors
PCA9574
8-bit I2C-bus and SMBus, level translating, low volage GPIO
7.2 Command register
Following the successful acknowledgement of the slave address + R/W bit, the bus
master will send a byte to the PCA9574, which will be stored in the Command register.
The lowest three bits are used as a pointer to determine which register will be accessed.
Only a command register code with the three least significant bits equal to the eight
allowable values as defined in Table 4 “Register summary” will be acknowledged.
Reserved or undefined command codes will not be acknowledged. At power-up, this
register defaults to 00h, with the AI bit set to ‘0’, and the lowest 3 bits set to ‘0’.
If the Auto-Increment flag is set (AI = 1), the three least significant bits of the Command
register are automatically incremented after a read or write. This allows the user to
program and/or read the eight command registers (listed in Table 4) sequentially. It will
then roll over to register 00h after the last register is accessed and the selected registers
will be overwritten or re-read.
If the Auto-Increment flag is cleared (AI = 0), the three least significant bits are not
incremented after data is read or written, only one register will be repeatedly read or
written.
7.3 Register definitions
7.4 Writing to port registers
Data is transmitted to the PCA9574 by sending the device address and setting the least
significant bit to logic 0 (see Figure 6 for device address). The command byte is sent after
the address and determines which register will receive the data following the command
byte. Each 8-bit register may be updated independently of the other registers.
Reset state = 00h
Remark: The Command register does not apply to Software Reset I2C-bus address.
Fig 7.
Command register
002aad056
AI
X
D2
D1
D0
register address
Auto-Increment flag
Table 4.
Register summary
Register
number
D2
D1
D0
Name
Type
Function
00h
000IN
read only
Input port register
01h
001INVRT
read/write
Polarity inversion register
02h
0
1
0
BKEN
read/write
Bus-hold enable register
03h
011PUPD
read/write
Pull-up/pull-down selector register
04h
100CFG
read/write
Port configuration register
05h
101OUT
read/write
Output port register
06h
110MSK
read/write
Interrupt mask register
07h
111INTS
read only
Interrupt status register
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9574PW-T | 功能描述:轉(zhuǎn)換 - 電壓電平 8-BIT I2C-BUS/SMBUS GPIO TRANS RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8 |
| PCA9575HF,118 | 功能描述:I2C 接口集成電路 16-BIT I2C-BUS SMBus LW Voltage GPIO RoHS:否 制造商:NXP Semiconductors 電源電壓-最大:5.5 V 電源電壓-最小:2.3 V 最大工作頻率:400 KHz 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-16 |
| PCA9575HF118 | 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
| PCA9575PW1,118 | 功能描述:I2C 接口集成電路 I2C Bus/ SMBus Level Translating 24-Pin RoHS:否 制造商:NXP Semiconductors 電源電壓-最大:5.5 V 電源電壓-最小:2.3 V 最大工作頻率:400 KHz 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-16 |
| PCA9575PW2,118 | 功能描述:I2C 接口集成電路 I2C Bus/ SMBus Level Translating 28-Pin RoHS:否 制造商:NXP Semiconductors 電源電壓-最大:5.5 V 電源電壓-最小:2.3 V 最大工作頻率:400 KHz 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-16 |
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