MAX11800–MAX11803
Low-Power, Ultra-Small Resistive Touch-Screen
Controllers with I2C/SPI Interface
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49
HEX
ACCESS
PAIRABLE
COMMAND LENGTH
FUNCTION
0x70h
Write
No
8
X, Y = combined command measurement
0x72h
Write
No
8
X, Y, Z1 = combined command measurement
0x74h
Write
No
8
X, Y, Z1, Z2 = combined command measurement
0x76h
Write
No
8
AUX = conversion
0x78h
Write
No
8
X = measurement, CONT = 0
0x79h
Write
No
8
X = measurement, CONT = 1
0x7Ah
Write
No
8
Y = measurement, CONT = 0
0x7Bh
Write
No
8
Y = measurement, CONT = 1
0x7Ch
Write
No
8
Z1 = measurement, CONT = 0
0x7Dh
Write
No
8
Z1 = measurement, CONT = 1
0x7Eh
Write
No
8
Z2 = measurement, CONT = 0
0x7Fh
Write
No
8
Z2 = measurement, CONT = 1
Table 21. Measurement Commands
BIT
7
654
321
0
NAME
ADC_BUSY
LPM
TDM
SCAN
FIFO_OVR
FIFO_INT
EDGE_INT
CONT_INT
DEFAULT
0
BIT
NAME
DESCRIPTION
MAX11800/
MAX11801
MAX11802/
MAX11803
7
ADC_BUSY
0: ADC is not in ACQ or CONV state
1: ADC is in ACQ or CONV state
This is for INTERNAL TEST only
Yes
6
LPM
0: Device is not in LPM or standby mode
1: Device is in LPM or standby mode
Yes
5
TDM
0: Device is not in TDM mode
1: Device is in TDM mode
Yes
4
SCAN
0: No scan or measurement in progress
1: Scan or measurement in progress
Also indicates presence of a continuous touch in autonomous
Yes
3
FIFO_OVR
0: FIFO overflow has not occurred
1: FIFO has overflowed since last readback operation
Enabled only if AUTO = 1
Yes
No
2
FIFO_INT
0: No unread data in FIFO
1: New data available in FIFO
Enabled only if AUTO = 1
Yes
No
1
EDGE_INT
0: No touch event in progress
1: Touch event in progress (cleared on ETAG = 10)
Enabled only if AUTO = 0 and EDGE_IRQ = 1
Yes
0
CONT_INT
0: No touch present
1: Touch present (or conversion in progress)
Enabled only if AUTO = 0 and EDGE_IRQ = 0
Yes
General Status Register (0x00) (Read Only)
User Configuration Registers