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參數(shù)資料
型號: PCA8575DB,118
廠商: NXP Semiconductors
文件頁數(shù): 29/30頁
文件大?。?/td> 0K
描述: IC I/O EXPANDER I2C 16B 24SSOP
特色產(chǎn)品: NXP - I2C Interface
標準包裝: 1
接口: I²C
輸入/輸出數(shù): 16
中斷輸出:
頻率 - 時鐘: 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: 24-SSOP(0.209",5.30mm 寬)
供應(yīng)商設(shè)備封裝: 24-SSOP
包裝: 標準包裝
包括: POR
其它名稱: 568-8702-6
PCA8575_2
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 02 — 21 March 2007
8 of 30
NXP Semiconductors
PCA8575
Remote 16-bit I/O expander for I2C-bus with interrupt
8.3 Reading from a port (Input mode)
All ports programmed as input should be set to logic 1. To read, the master
(microcontroller) rst addresses the slave device after it receives the interrupt. By setting
the last bit of the byte containing the slave address to logic 1 the Read mode is entered.
The data bytes that follow on the SDA are the values on the ports.
If the data on the input port changes faster than the master can read, this data may be
lost.
Fig 11. Write mode (output)
A5 A4 A3 A2 A1 A0
0
A
SA6
slave address
START condition
R/W
acknowledge
from slave
002aab632
P
06
1
P
07
data to port 0
A
acknowledge
from slave
12345678
SCL
9
SDA
A
acknowledge
from slave
write to port
data output from port
tv(Q)
P05
data to port 1
data A0 and B0 valid
P16 output voltage
Itrt(pu)
IOH
td(rst)
P16 pull-up output current
INT
P
04
P
03
P
02
P
01
P
00
P
17
P
14
P
13
P
12
P
11
P
10
1
P16
P
15
tv(Q)
data A0 and B0 valid
P05 output voltage
Itrt(pu)
IOH
P05 pull-up output current
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