參數(shù)資料
型號： PCA9557
廠商： NXP Semiconductors N.V.
英文描述： 8-bit I2C and SMBus I/0 port with reset
中文描述： 8位I2C和SMBus I / 0端口復位
文件頁數(shù)： 10/16頁
文件大?。?/td> 127K
代理商： PCA9557
Philips Semiconductors
Product data
PCA9557
8-bit I
2
C and SMBus I/0 port with reset
2001 Dec 12
10
0
0
1
1
A2
A1
A0
READ FROM
PORT
DATA INTO
PORT
SDA
S
1
A
A
DATA 1
DATA 4
slave address
data from port
data from port
start condition
R/W
acknowledge
from slave
acknowledge
from master
stop
condition
t
ps
DATA 4
DATA 2
P
DATA 3
t
ph
SW00799
no acknowledge
from master
NA
NOTES:
1. This figure assumes the command byte has previously been programmed with 00h.
2. Transfer of data can be stopped at any moment by a stop condition. When this occurs, data present at the last acknowledge phase is valid
(output mode). Input data is lost.
Figure 15. READ input port register
TYPICAL APPLICATION
SW00993
I/0
0
I/0
1
I/0
2
I/0
3
I/0
4
I/0
5
I/0
6
I/0
7
V
DD
V
DD
SCL
SDA
RESET
RESET
RESET
MASTER
CONTROLLER
GND
SCL
SDA
PCA9557
A2
A1
A0
GND
V
DD
SUBSYSTEM 3
(e.g. alarm
system)
SUBSYSTEM 2
(e.g. counter)
SUBSYSTEM 1
(e.g. temp sensor)
INT
V
DD
ALARM
Controlled Switch
(e.g. CBT device)
ENABLE
1.6 k
1.6 k
1.1 k
2 k
NOTE:
Device address configured as 0011100 for this example
I/0
0
, I/0
1
, I/0
2
, configured as outputs
I/0
3
, I/0
4
, I/0
, configured as inputs
I/0
06
, I/0
7
, are not used and have to be configured as outputs
A
B
2 k
Figure 16. Typical application
相關PDF資料
PDF描述
PCA9558 8-bit I2C and SMBus I/O port with 5-bit multiplexed/1-bit latched 6-bit I2C EEPROM and 2 k bit EEPROM
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相關代理商/技術參數(shù)
參數(shù)描述
PCA9557BS 制造商:NXP Semiconductors 功能描述:
PCA9557BS,118 功能描述:接口-I/O擴展器 8-BIT I2C FM TP GPIO RST RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
PCA9557D 功能描述:接口-I/O擴展器 Remote 8B I2C & SMBus I/O Expander RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
PCA9557D,112 功能描述:接口-I/O擴展器 OCT SMBUS/I2C INTRFC RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
PCA9557D,118 功能描述:接口-I/O擴展器 8-BIT I2C FM TP GPIO RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel
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