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器件3D模型￥ 9.989
PCA9575PW2,118 数据手册 - NXP（恩智浦）
制造商:
NXP（恩智浦）
分类:
接口芯片
封装:
TSSOP-28
描述:
输入/输出扩展, 16bit, 400 kHz, I2C, SMBus, 1.1 V, 3.6 V, TSSOP
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
应用领域在P12P63P135P136
导航目录
PCA9575PW2,118数据手册
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DesignCon 2003 TecForum I
2
C Bus Overview
6
General concept for Serial communications
SCL
SDA
“MASTER”
SLAVE 1
SLAVE 2
SLAVE 3
DATA
Parallel to Serial
Shift Register
enable
enable
enable
select 3
select 2
select 1
R/W
R/W
R/W
READ
or
WRITE?
// to Ser.
Shift Reg#
// to Ser.
Shift Reg#
// to Ser.
Shift Reg#
• A point to point communication does not require a Select control signal
• An asynchronous communication does not have a Clock signal
• Data, Select and R/W signals can share the same line, depending on the protocol
• Notice that Slave 1 cannot communicate with Slave 2 or 3 (except via the ‘master’)
Only the ‘master’ can start communicating. Slaves can ‘only speak when spoken to’
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