MAX11800–MAX11803
Low-Power, Ultra-Small Resistive Touch-Screen
Controllers with I2C/SPI Interface
54
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BIT
7
6
5
4
3
2
1
0
NAME
APRX[3:0]
APRY[3:0]
DEFAULT
0
BIT
NAME
DESCRIPTION
MAX11800/
MAX11801
MAX11802/
MAX11803
7:4
APRX[3:0]
± X for aperture checking
0000 = 2-1 LSB = aperture checking disabled
0001 = 2(1-1) LSB = ±1 LSB
0010 = 2(2-1) LSB = ±2 LSB
0011 = 2(3-1) LSB = ±4 LSB
.
1001 = 2(9-1) LSB = ±256 LSB
1010 = 2(10-1) LSB = ±512 LSB
1011 = 2(11-1) LSB = ±1024 LSB
1100 = 2(12-1) LSB = ±2048 LSB
1101 = N/A = aperture checking disabled
Yes
No
3:0
APRY[3:0]
± Y for aperture checking
APRY[3:0] has the same range as APRX[3:0] above.
Yes
No
Aperture Configuration Register (0x09)
Note: These aperture settings apply in autonomous conversion mode only and control whether data meets the criteria for logging
into the FIFO.
BIT
7
6
5
4
3
2
1
0
NAME
TINIT[3:0]
SCANP[3:0]
DEFAULT
0
BIT
NAME
DESCRIPTION
MAX11800/
MAX11801
MAX11802/
MAX11803
7:4
TINIT[3:0]
Initial period (time between touch and initial scan block, tINIT)
0000: 10μs
1000: 1ms
0001: 20μs
1001: 2ms
0010: 50μs
1010: 5ms
0011: 80μs
1011: 10ms
0100: 100μs
1100: 20ms
0101: 200μs
1101: 50ms
0110: 500μs
1110: 100ms
0111: 800μs
1111: 200ms
Yes
No
3:0
SCANP[3:0]
Scan period (time between successive scan blocks, tSP)
SCANP[3:0] has the same range as TINIT[3:0] above.
Yes
No
Autonomous Mode Timing Configuration Register (0x08)
Note: These settings apply in autonomous conversion mode only.