参数资料
型号: AD7877ACPZ-REEL
厂商: Analog Devices Inc
文件页数: 38/45页
文件大小: 0K
描述: IC ADC 12BIT TOUCHSCREEN 32LFCSP
标准包装: 5,000
类型: 电阻
触摸面板接口: 4 线
输入数/键: 1 TSC
分辨率(位): 12 b
评估套件: 可供
数据接口: 串行,SPI?
数据速率/采样率 (SPS,BPS): 125k
电压基准: 外部,内部
电源电压: 2.7 V ~ 5.25 V
电流 - 电源: 1µA
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 32-VFQFN 裸露焊盘,CSP
供应商设备封装: 32-LFCSP-VQ
包装: 带卷 (TR)
配用: EVAL-AD7877EBZ-ND - BOARD EVALUATION FOR AD7877
AD7877
Data Sheet
Rev. D | Page 42 of 44
GPIO REGISTERS
GPIO registers are written to using an extended 8-bit address.
The first four bits of the data-word are always 1111b to access
the extended writing map. The next four bits are the register
address. This leaves 8 bits for the GPIO data.
GPIO registers are read like all other registers, by writing a 5-bit
address to Control Register 1, then reading DOUT.
See the GPIO Configuration section for information on
configuring the GPIOs.
Register Name: GPIO Control Register 1
Write Address: [1111] 0000
Read Address:
11011
Default Value:
0x000
Type:
Read/write
Table 22.
Bit
Name
Read/Write
Description
0
GPIO2_ALEN
R/W
If this bit is 1, GPIO2 is an interrupt source for the ALERT output; clearing this bit masks out GPIO2
as an interrupt source for the ALERT output
1
GPIO2_DIR
R/W
This bit sets the direction of GPIO2
0 = output
1 = input
2
GPIO2_POL
R/W
This bit determines if GPIO2 is active high or low
0 = active low
1 = active high
3
GPIO2_EN
R/W
This bit selects the function of AUX2/GPIO2
0 = AUX2
1 = GPIO2
4
GPIO1_ALEN
R/W
If this bit is 1, GPIO1 is an interrupt source for the ALERT output; clearing this bit masks out GPIO1
as an interrupt source for the ALERT output
5
GPIO1_DIR
R/W
This bit sets the direction of GPIO1
0 = output
1 = input
6
GPIO1_POL
R/W
This bit determines if GPIO1 is active high or low
0 = active low
1 = active high
7
GPIO1_EN
R/W
This bit selects the function of AUX1/GPIO1
0 = AUX1
1 = GPIO1
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