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參數(shù)資料
型號(hào): PCA8575BQ,118
廠商: NXP Semiconductors
文件頁數(shù): 27/30頁
文件大?。?/td> 0K
描述: IC I/O EXPANDER I2C 16B 24DHVQFN
標(biāo)準(zhǔn)包裝: 3,000
接口: I²C
輸入/輸出數(shù): 16
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: 24-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 24-DHVQFN(5.5x3.5)
包裝: 帶卷 (TR)
包括: POR
其它名稱: 935283506118
PCA8575BQ-T
PCA8575BQ-T-ND
PCA8575_2
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 02 — 21 March 2007
6 of 30
NXP Semiconductors
PCA8575
Remote 16-bit I/O expander for I2C-bus with interrupt
7.
Functional description
7.1 Device address
Following a START condition, the bus master must send the address of the slave it is
accessing and the operation it wants to perform (read or write). The address of the
PCA8575 is shown in Figure 9. Slave address pins AD2, AD1, and AD0 choose 1 of
8 slave addresses. To conserve power, no internal pull-up resistors are incorporated on
AD2, AD1, and AD0. Address values depending on AD2, AD1, and AD0 can be found in
Remark: The General Call address (0000 0000b) and the Device ID address
(1111 100Xb) are reserved and cannot be used as device address. Failure to follow this
requirement will cause the PCA8575 not to acknowledge.
The last bit of the rst byte denes the operation to be performed. When set to logic 1 a
read is selected, while a logic 0 selects a write operation.
When AD2, AD1 and AD0 are held to VDD or VSS, the same address as the PCF8575 is
applied.
7.1.1 Address map
Fig 9.
PCA8575 address
R/W
002aab636
A6
A5
A4
A3
A2
A1
A0
programmable
slave address
Table 3.
PCA8575 address map
A6
A5
A4
A3
A2
A1
A0
Address (hex)
010000020h
010000121h
010001022h
010001123h
010010024h
010010125h
010011026h
010011127h
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