參數(shù)資料
型號(hào)： EVAL-AD7877EB
廠商： Analog Devices, Inc.
英文描述： Touch Screen Controller
中文描述： 觸摸屏控制器
文件頁(yè)數(shù)： 42/44頁(yè)
文件大?。?/td> 1002K
代理商： EVAL-AD7877EB
AD7877
Register Name: GPIO Control Register 2
Write Address: [1111] 0001; Read Address: 11100; Default Value: 0x000.
Table 23.
Read/
Write
0
GPIO4_ALEN
R/W
Rev. A | Page 42 of 44
Bit
Name
Description
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.
This bit sets the direction of GPIO4.
0 = Output
1 = Input
This bit determines if GPIO4 is active high or low.
0 = Active low
1 = Active high
This bit is not used.
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.
This bit sets the direction of GPIO3.
0 = Output
1 = Input
This bit determines if GPIO3 is active high or low.
0 = Active low
1 = Active high
This bit selects the function of AUX3/GPIO3.
0 = AUX3
1 = GPIO3
1
GPIO4_DIR
R/W
2
GPIO4_POL
R/W
3
4
Not Used
GPIO3_ALEN
R/W
5
GPIO3_DIR
R/W
6
GPIO3_POL
R/W
7
GPIO3_EN
R/W
Register Name: GPIO Data Register
Write Address: [1111] 0010; Read Address: 11101; Default Value: 0x000.
Table 24.
Read/
Write
0
Not Used
1
Not Used
2
Not Used
3
Not Used
4
GPIO4_DAT
R/W
5
GPIO3_DAT
R/W
6
GPIO2_DAT
R/W
7
GPIO1_DAT
R/W
Bit
Name
Description
This bit is not used.
This bit is not used.
This bit is not used.
This bit is not used.
GPIO4 data bit.
GPIO3 data bit.
GPIO2 data bit.
GPIO1 data bit.
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