参数资料
型号: AD7877ACPZ-REEL
厂商: Analog Devices Inc
文件页数: 30/45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
Data Sheet
AD7877
Rev. D | Page 35 of 44
DETAILED REGISTER DESCRIPTIONS
Register Name: Control Register 1
Write Address: 0001
Read Address:
00001
Default Value:
0x000
Type:
Read/write
Table 16.
Bit
Name
Read/Write
Description
0
MODE0
R/W
LSB of ADC mode code
1
MODE1
R/W
MSB of ADC mode code
00 = no conversion
01 = single conversion
10 = conversion sequence (slave mode)
11 = conversion sequence (master mode)
2
RD0
R/W
LSB of register read address; to read a register, its address must first be written to Control Register 1
3
RD1
R/W
Bit 1 of register read address; to read a register, its address must first be written to Control Register 1
4
RD2
R/W
Bit 2 of register read address; to read a register, its address must first be written to Control Register 1
5
RD3
R/W
Bit 3 of register read address; to read a register, its address must first be written to Control Register 1
6
RD4
R/W
MSB of register read address; to read a register, its address must first be written to Control Register 1
7
CHADD0
R/W
LSB of ADC channel address
8
CHADD1
R/W
Bit 1 of ADC channel address
9
CHADD2
R/W
Bit 2 of ADC channel address
10
CHADD3
R/W
MSB of ADC channel address
0000 = X+ input (Y position)
0001 = Y+ input (X position)
0010 = Y (Z2) input (used for touch-pressure calculation)
0011 = Auxiliary Input 1 (AUX1)
0100 = Auxiliary Input 2 (AUX2)
0101 = Auxiliary Input 3 (AUX3)
0110 = Battery Monitor Input 1 (BAT1)
0111 = Battery Monitor Input 2 (BAT2)
1000 = Temperature Measurement 1 (used for single conversion)
1001 = Temperature Measurement 2 (used for differential measurement method)
1010 = X+ (Z1) input (used for touch-pressure calculation)
11
SER/DFR
R/W
Selects normal (single-ended) or ratiometric (differential) conversion
0 = ratiometric (differential)
1 = normal (single-ended)
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