參數(shù)資料
型號(hào): PCA9538PW,112
廠商: NXP Semiconductors
文件頁數(shù): 32/34頁
文件大小: 0K
描述: IC I/O EXPANDER I2C 8B 16TSSOP
標(biāo)準(zhǔn)包裝: 96
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-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 16-TSSOP
包裝: 管件
包括: POR
其它名稱: 935277419112
PCA9538PW
PCA9538PW-ND
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
7 of 34
NXP Semiconductors
PCA9538
8-bit I2C-bus and SMBus low power I/O port with interrupt and reset
6.2.3 Register 1 - Output Port register
This register reflects the outgoing logic levels of the pins defined as outputs by Register 3.
Bit values in this register have no effect on pins defined as inputs. Reads from this register
return the value that is in the flip-flop controlling the output selection, not the actual pin
value.
6.2.4 Register 2 - Polarity Inversion register
This register allows the user to invert the polarity of the Input Port register data. If a bit in
this register is set (written with 1), the corresponding Input Port data is inverted. If a bit in
this register is cleared (written with a 0), the Input Port data polarity is retained.
Table 6.
Register 1 - Output Port register bit description
Legend: * default value.
Bit
Symbol
Access
Value
Description
7
O7
R
1*
reflects outgoing logic levels of pins defined as outputs
by Register 3
6O6
R
1*
5O5
R
1*
4O4
R
1*
3O3
R
1*
2O2
R
1*
1O1
R
1*
0O0
R
1*
Table 7.
Register 2 - Polarity Inversion register bit description
Legend: * default value.
Bit
Symbol
Access
Value
Description
7
N7
R/W
0*
inverts polarity of Input Port register data
0 = Input Port register data retained (default value)
1 = Input Port register data inverted
6N6
R/W
0*
5N5
R/W
0*
4N4
R/W
0*
3N3
R/W
0*
2N2
R/W
0*
1N1
R/W
0*
0N0
R/W
0*
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