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AD7877 Folha de dados(PDF) 44 Page - Analog Devices

Nome de Peças AD7877
Descrição Electrónicos  Touch Screen Controller
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
Logo AD - Analog Devices

AD7877 Folha de dados(HTML) 44 Page - Analog Devices

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Data Sheet
AD7877
Register Name: GPIO Control Register 2
Write Address: [1111] 0001
Read Address:
11100
Default Value:
0x000
Type:
Read/write
Table 23.
Bit
Name
Read/Write
Description
0
GPIO4_ALEN
R/W
If this bit is 1, GPIO4 is an interrupt source for the ALERT output; clearing this bit masks out GPIO3
as an interrupt source for the ALERT output
1
GPIO4_DIR
R/W
This bit sets the direction of GPIO4
0 = output
1 = input
2
GPIO4_POL
R/W
This bit determines if GPIO4 is active high or low
0 = active low
1 = active high
3
Not Used
This bit is not used
4
GPIO3_ALEN
R/W
If this bit is 1, GPIO3 is an interrupt source for the ALERT output; clearing this bit masks out GPIO4
as an interrupt source for the ALERT output
5
GPIO3_DIR
R/W
This bit sets the direction of GPIO3
0 = output
1 = input
6
GPIO3_POL
R/W
This bit determines if GPIO3 is active high or low
0 = active low
1 = active high
7
GPIO3_EN
R/W
This bit selects the function of AUX3/GPIO3
0 = AUX3
1 = GPIO3
Register Name: GPIO Data Register
Write Address: [1111] 0010
Read Address:
11101
Default Value:
0x000
Type:
Read/write
Table 24.
Bit
Name
Read/Write
Description
0
Not used
This bit is not used
1
Not used
This bit is not used
2
Not used
This bit is not used
3
Not used
This bit is not used
4
GPIO4_DAT
R/W
GPIO4 data bit
5
GPIO3_DAT
R/W
GPIO3 data bit
6
GPIO2_DAT
R/W
GPIO2 data bit
7
GPIO1_DAT
R/W
GPIO1 data bit
Rev. E | Page 43 of 45


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