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參數(shù)資料
型號： PCA9502BS,157
廠商： NXP Semiconductors
文件頁數(shù)： 21/25頁
文件大?。?/td> 0K
描述： IC I/O EXPANDER I2C/SPI 24HVQFN
標(biāo)準(zhǔn)包裝： 2,450
接口： I²C，SPI
輸入/輸出數(shù)： 8
中斷輸出： 無
頻率 - 時鐘： 400kHz
電源電壓： 2.3 V ~ 3.6 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-HVQFN（4x4）
包裝： 托盤
其它名稱： 935281363157
PCA9502BS
PCA9502BS-ND
PCA9502_3
NXP B.V. 2006. All rights reserved.
Product data sheet
Rev. 03 — 13 October 2006
5 of 25
NXP Semiconductors
PCA9502
8-bit I/O expander with I2C-bus/SPI interface
7.2 Interrupts
The PCA9502 has interrupt generation capability. The interrupt enable register (IOIntEna)
enables interrupts due to I/O pin change of state, and the IRQ signal in response to an
interrupt generation.
8.
Register descriptions
The programming combinations for register selection are shown in Table 5.
[1]
Other addresses 0x00 through 0x09, 0x0F are reserved and should not be accessed (read or write).
[2]
These bits are reserved and should be set to 0.
8.1 Programmable I/O pins Direction register (IODir)
This register is used to program the I/O pins direction. Bit 0 to bit 7 control GPIO0 to
GPIO7.
Remark: If there is a pending input (GPIO) interrupt and IODir is written, this pending
interrupt will be cleared, that is, the interrupt signal will be negated.
Table 5.
Register map - read/write properties
Register name
Read mode
Write mode
IODir
I/O pin direction
IOState
I/O pin states
n/a
IOIntEna
I/O interrupt enable register
IOControl
I/O pins control
Table 6.
PCA9502 internal registers
Register
address
Register
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R/W
General Register Set
0x0A[1]
IODir
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
R/W
0x0B[1]
IOState
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
R/W
0x0C[1]
IOIntEna
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
R/W
0x0D[1]
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
0x0E[1]
IOControl
reserved
reserved
reserved
reserved
SReset
reserved
reserved
IOLatch
R/W
Table 7.
IODir register (address 0x0A) bit description
Bit
Symbol
Description
7:0
IODir
set GPIO pins 7:0 to input or output
0 = input
1 = output
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