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參數(shù)資料
| 型號(hào)： | PCF8574 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Remote 8-bit I/O expander for I2C-bus |
| 中文描述： | SPECIALTY MICROPROCESSOR CIRCUIT |
| 文件頁(yè)數(shù)： | 8/24頁(yè) |
| 文件大?。?/td> | 156K |
| 代理商： | PCF8574 |
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1997 Apr 02
8
Philips Semiconductors
Product specification
Remote 8-bit I/O expander for I
2
C-bus
PCF8574
7
FUNCTIONAL DESCRIPTION
7.1
Addressing
For addressing see Figs 9, 10 and 11.
Fig.8 Simplified schematic diagram of each I/O.
handbook, full pagewidth
MBD977
D
Q
CI
S
FF
D
Q
CI
S
FF
100
μ
A
to interrupt
logic
VSS
P0 to P7
VDD
write pulse
data from
shift register
power-on
reset
read pulse
data to
shift register
Fig.9 PCF8574 and PCF8574A slave addresses.
handbook, full pagewidth
MBD973
S
0
1
0
0
A2
A1
A0
0
A
1
0
slave address
slave address
A
S
0
1
1
A2
A1
A0
a.
b.
(a) PCF8574.
(b) PCF8574A.
Each of the PCF8574’s eight I/Os can be independently
used as an input or output. Input data is transferred from
the port to the microcontroller by the READ mode
(see Fig.11). Output data is transmitted to the port by the
WRITE mode (see Fig.10).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCF8574_02 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Remote 8-bit I/O expander for I2C-bus |
| PCF8574_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:REMOTE 8-BIT I/O EXPANDER FOR I2C BUS |
| PCF8574_08 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:REMOTE 8-BIT I/O EXPANDER FOR I2C BUS |
| PCF8574_10 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:REMOTE 8-BIT I/O EXPANDER FOR I2C BUS |
| PCF8574A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:REMOTE 8BIT I/O EXPANDER FOR I2C BUS |
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