MAX11800_1010 Datasheet, PDF (55/59 Pages) Maxim Integrated Products – Low-Power, Ultra-Small Resistive Touch-Screen Controllers with I2C/SPI Interface

Low-Power, Ultra-Small Resistive Touch-Screen
Controllers with I²C/SPI Interface
Auxiliary Measurement Configuration Register (0x0A)
BIT
NAME
DEFAULT
7
6
5
D_CV_A[3:0]
0
0
0
4
3
T_SAMPLE_A[1:0]
0
0
2
1
AVGA[1:0]
0
0
0
RESA
0
BIT
NAME
DESCRIPTION
MAX11800/ MAX11802/
MAX11801 MAX11803
Delay initial auxiliary conversion
000: 10μs
001: 100μs
010: 500μs
7:5
D_CV_A[3:0] 011: 1ms
100: 5ms
101: 10ms
110: 50ms
111: 100ms
Yes
Yes
Sampling time for auxiliary measurements
00: 4 x (2MHz oscillator clock period) = 2μs
4:3
T_SAMPLE_A[1:0] 01: 16 x (2MHz oscillator clock period) = 8μs
10: 64 x (2MHz oscillator clock period) = 32μs
11: 256 x (2MHz oscillator clock period) = 128μs
Yes
Yes
Averaging sample depth for auxiliary measurements
If AVG_FLT = 0 (see the Operating Mode Configuration Register
(0x0B) section)
00: Single sample, no averaging
01: Take four samples, average two median samples
10: Take eight samples, average four median samples
2:1
AVGA[1:0]
11: Take 16 samples, average eight median samples
Yes
Yes
If AVG_FLT = 1 (see the Operating Mode Configuration Register
(0x0B) section)
00: Single sample, no averaging
01: Take four samples, average all samples
10: Take eight samples, average all samples
11: Take 16 samples, average all samples
Resolution for auxiliary measurements
0
RESA
0: 12-bit conversion (see the description of PWR_SAV in the
Measurement Resolution Configuration Register (0x02) section)
Yes
Yes
1: 8-bit conversion
Note: A delimiter refers to the auxiliary input (AUX). Auxiliary measurements can only be requested in direct conversion modes.
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