AD7877 Analog Devices, AD7877 Datasheet - Page 39

• Manufacturer Part Number: AD7877
• Description: Touch Screen Controller
• Manufacturer: Analog Devices

Specifications of AD7877

• Resolution (bits): 12bit
• # Chan: 9
• Sample Rate: 125kSPS
• Interface: Ser
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref),Uni 2.5V
• Adc Architecture: SAR
• Pkg Type: CSP

Data Sheet
Register Name: Sequencer Register 0
Write Address:
Read Address:
Default Value:
Type:
Table 19.
Bit
0
1
2
3
4
5
6
7
8
9
10
11
Register Name: Sequencer Register 1
Write Address:
Read Address:
Default Value:
Type:
Table 20.
Bit
0
1
2
3
4
5
6
7
8
9
10
11
Name
Not Used
Z1_SS
TEMP2_SS
TEMP1_SS
BAT2_SS
BAT1_SS
AUX3_SS
AUX2_SS
AUX1_SS
Z2_SS
XPOS_SS
YPOS_SS
Name
Not Used
Z1_MS
TEMP2_MS
TEMP1_MS
BAT2_MS
BAT1_MS
AUX3_MS
AUX2_MS
AUX1_MS
Z2_MS
XPOS_MS
YPOS_MS
1100
01100
0x000
Read/write
1101
01101
0x000
Read/write
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
This bit is not used
Setting this bit includes the Z1 touch-pressure measurement (X+ input) in a slave mode sequence
Setting this bit includes a temperature measurement using differential conversion in a slave mode
sequence
Setting this bit includes a temperature measurement using single-ended conversion in a slave mode
sequence
Setting this bit includes measurement of Battery Monitor Input 2 in a slave mode sequence
Setting this bit includes measurement of Battery Monitor Input 1 in a slave mode sequence
Setting this bit includes measurement of Auxiliary Input 3 in a slave mode sequence
Setting this bit includes measurement of Auxiliary Input 2 in a slave mode sequence
Setting this bit includes measurement of Auxiliary Input 1 in a slave mode sequence
Setting this bit includes the Z2 touch-pressure measurement (Y− input) in a slave mode sequence
Setting this bit includes measurement of the X position (Y+ input) in a slave mode sequence
Setting this bit includes measurement of the Y position (X+ input) in a slave mode sequence
Description
This bit is not used
Setting this bit includes the Z1 touch-pressure measurement (X+ input) in a master mode sequence
Setting this bit includes a temperature measurement using differential conversion in a master mode
sequence
Setting this bit includes a temperature measurement using single-ended conversion in a master mode
sequence
Setting this bit includes measurement of Battery Monitor Input 2 in a master mode sequence
Setting this bit includes measurement of Battery Monitor Input 1 in a master mode sequence
Setting this bit includes measurement of Auxiliary Input 3 in a master mode sequence
Setting this bit includes measurement of Auxiliary Input 2 in a master mode sequence
Setting this bit includes measurement of Auxiliary Input 1 in a master mode sequence
Setting this bit includes the Z2 touch-pressure measurement (Y− input) in a master mode sequence
Setting this bit includes measurement of the X position (Y+ input) in a master mode sequence
Setting this bit includes measurement of the Y position (X+ input) in a master mode sequence
Rev. D | Page 39 of 44
AD7877