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參數(shù)資料
| 型號： | PCA9555 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 16-bit I2C and SMBus I/O port with interrupt |
| 中文描述： | 16位I2C和SMBus I / O端口的中斷 |
| 文件頁數(shù)： | 5/22頁 |
| 文件大?。?/td> | 185K |
| 代理商： | PCA9555 |
Philips Semiconductors
Product data sheet
PCA9555
16-bit I
2
C and SMBus I/O port with interrupt
2004 Sep 30
5
SIMPLIFIED SCHEMATIC OF I/Os
WRITE PULSE
DATA FROM
SHIFT REGISTER
V
DD
I/O PIN
V
SS
WRITE CONFIGURATION
PULSE
D
C
K
FF
Q
D
C
K
Q
FF
D
C
K
Q
FF
D
C
K
Q
FF
INPUT PORT
REGISTER
POLARITY
INVERSION
REGISTER
OUTPUT
PORT
REGISTER
DATA FROM
SHIFT REGISTER
DATA FROM
SHIFT REGISTER
WRITE
POLARITY
PULSE
CONFIGURATION
REGISTER
OUTPUT PORT
REGISTER DATA
INPUT PORT
REGISTER DATA
POLARITY
REGISTER DATA
READ PULSE
SU01473
Q
Q
Q
Q
TO INT
100 k
Q1
Q2
NOTE:
At Power-on Reset, all registers return to default values.
Figure 4. Simplified schematic of I/Os
I/O port
When an I/O is configured as an input, FETs Q1 and Q2 are off,
creating a high impedance input with a weak pull-up to V
DD
. The
input voltage may be raised above V
DD
to a maximum of 5.5 V.
If the I/O is configured as an output, then either Q1 or Q2 is on,
depending on the state of the Output Port register. Care should be
exercised if an external voltage is applied to an I/O configured as an
output because of the low impedance path that exists between the
pin and either V
DD
or V
SS
.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9555_08 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:REMOTE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS |
| PCA9555_10 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:REMOTE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS |
| PCA9555_13 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:16-bit I2C-bus and SMBus I/O port with interrupt |
| PCA9555A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Smart, simple solutions for the 12 most common design concerns |
| PCA9555AHF | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low-voltage 16-bit I2C-bus I/O port with interrupt and weak pull-up |
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