參數(shù)資料
型號: PCA9538D,118
廠商: NXP Semiconductors
文件頁數(shù): 2/34頁
文件大小: 0K
描述: IC I/O EXPANDER I2C 8B 16SOIC
產(chǎn)品培訓(xùn)模塊: I²C Bus Fundamentals
特色產(chǎn)品: NXP - I2C Interface
標(biāo)準(zhǔn)包裝: 1
接口: I²C,SM 總線
輸入/輸出數(shù): 8
中斷輸出:
頻率 - 時(shí)鐘: 400kHz
電源電壓: 2.3 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-SOIC(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 16-SO
包裝: 標(biāo)準(zhǔn)包裝
包括: POR
其它名稱: 568-1839-6
PCA9538
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 6 — 6 February 2013
10 of 34
NXP Semiconductors
PCA9538
8-bit I2C-bus and SMBus low power I/O port with interrupt and reset
6.7 Bus transactions
Data is transmitted to the PCA9538 registers using the write mode as shown in Figure 7
and Figure 8. Data is read from the PCA9538 registers using the read mode as shown in
Figure 9 and Figure 10. These devices do not implement an auto-increment function so
once a command byte has been sent, the register which was addressed will continue to
be accessed by reads until a new command byte has been sent.
Expanded diagram is shown in Figure 18.
Fig 7.
Write to output port register
0
A
S
slave address
START condition
R/W
acknowledge
from slave
002aae708
0000001
0
command byte
A
acknowledge
from slave
12345678
SCL
9
SDA
DATA 1
A
write to port
data out from port
tv(Q)
acknowledge
from slave
DATA 1 VALID
data to port
1100
A1 A0
1
P
STOP
condition
Fig 8.
Write to configuration or polarity inversion registers
0
A
S
slave address
START condition
R/W
acknowledge
from slave
002aae709
000001 1/0
0
command byte
A
acknowledge
from slave
12345678
SCL
9
SDA
DATA 1
A
data to register
acknowledge
from slave
data to register
1100
A1 A0
1
P
STOP
condition
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