EVAL-AD7877EBZ Analog Devices Inc, EVAL-AD7877EBZ Datasheet - Page 39

• Manufacturer Part Number: EVAL-AD7877EBZ
• Description: BOARD EVALUATION FOR AD7877
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD7877EBZ

• Main Purpose: Interface, Touch Screen Controller
• Embedded: No
• Utilized Ic / Part: AD7877
• Primary Attributes: 4-Wire Resistive Touch Screen Controller, SPI Interface, On-Chip: Temp Sensor, Voltage Reference, 8-Bit DAC
• Secondary Attributes: USB GUI, LCD Noise Reduction Feature, 2.7 ~ 5.25 V, Wake Up on Touch Feature
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Register Name: DAC Register
Write Address: 1110; Read Address: 01110; Default Value: 0x000; Type: Read/Write.
Table 21.
Bit
0
1
2
3
4
5
6
7
8
9
10
11
Register Name: Y Position
Write Address: N/A; Read Address: 10000;
Default Value: 0x000; Type: Read Only.
This register contains the 12-bit result of the measurement at
the X+ input with Y layer excited (Y position measurement).
Register Name: X Position
Write Address: N/A; Read Address: 10001;
Default Value: 0x000; Type: Read Only.
This register contains the 12-bit result of the measurement at
the Y+ input with X layer excited (X position measurement).
Register Name: Z2
Write Address: N/A; Read Address: 10010;
Default Value: 0x000; Type: Read Only.
This register contains the 12-bit result of the measurement at
the Y− input with excitation voltage applied to Y+ and X− (used
for touch-pressure calculation).
Register Name: AUX1
Write Address: N/A; Read Address: 10011;
Default Value: 0x000; Type: Read Only.
This register contains the 12-bit result of the measurement at
Auxiliary Input 1.
Name
RANGE
Not Used
V/I
PD
DAC0
DAC1
DAC2
DAC3
DAC4
DAC5
DAC6
DAC7
Read/Write
R/W
R/W
R/W
R/W
Description
Output range of the DAC in voltage mode
This bit is not used
Voltage output and current output
DAC power-down
LSB of DAC data
Bit 1 of DAC data
Bit 2 of DAC data
Bit 3 of DAC data
Bit 4 of DAC data
Bit 5 of DAC data
Bit 6 of DAC data
MSB of DAC data
Rev. B | Page 39 of 44
0 = DAC on
1 = DAC powered down
0 = 0 to V
1 = 0 to V
0 = voltage
1 = current
CC
CC
/2
Register Name: AUX2
Write Address: N/A; Read Address: 10100;
Default Value: 0x000; Type: Read Only.
This register contains the 12-bit result of the measurement at
Auxiliary Input 2.
Register Name: AUX3
Write Address: N/A; Read Address: 10101;
Default Value: 0x000; Type: Read Only.
This register contains the 12-bit result of the measurement at
Auxiliary Input 3.
Register Name: BAT1
Write Address: N/A; Read Address: 10110;
Default Value: 0x000; Type: Read Only.
This register contains the 12-bit result of the measurement at
Battery Monitor Input 1.
Register Name: BAT2
Write Address: N/A; Read Address: 10111;
Default Value: 0x000; Type: Read Only.
This register contains the 12-bit result of the measurement at
Battery Monitor Input 2.
AD7877