MAX11800–MAX11803
Low-Power, Ultra-Small Resistive Touch-Screen
Controllers with I2C/SPI Interface
______________________________________________________________________________________
17
DIRECT CONVERSION MODE
CONFIGURATION REGISTER 0x0B BITS[6:5] = 00
PANEL TIMING
0x05
PANEL SETUP
0x69–0x6F
CONFIGURATION
REGISTERS
SETUP, MEASUREMENTS,
AND READBACK COMMANDS
PANEL TIMING (1)
0x05
N/A
CONFIGURATION
REGISTERS
SETUP, MEASUREMENTS,
AND READBACK COMMANDS (2)
OPERATION MODE
AUTONOMOUS CONVERSION MODE
CONFIGURATION REGISTER 0x0B BITS[6:5] = 01, 10, 11
N/A
COMBINED MEASUREMENT
MEASUREMENT: 0x70–0x75
DATA READBACK: 0x52–0x59
COMBINED MEASUREMENT
0x0B
MEASUREMENT: N/A
FIFO READBACK: 0x50
N/A
PANEL MEASUREMENT
MEASUREMENT: 0x78–0x7F
DATA READBACK: 0x52–0x59
AUX
0x0A
AUX MEASUREMENT
MEASUREMENT: 0x76–0x77
DATA READBACK: 0x5A–0x5B
N/A
MAX11800/MAX11801
OPERATION MODES
PANEL SETUP
AVERAGING METHOD
0x03, 0x0B
N/A
AVERAGING METHOD (1)
0x03, 0x0B
N/A
EDGE INTERRUPT MODE
0x01
N/A
CONTINUOUS INTERRUPT MODE
0x01
N/A
EVENT TAG (ETAG)
(FIFO NOT USED)
DATA READBACK: 0x52–0x59
FIFO READBACK: 0x50
EVENT TAG (ETAG)
(USES FIFO)
MEASUREMENT TAG (MTAG)
(FIFO NOT USED)
DATA READBACK: 0x52–0x59
MEASUREMENT TAG (MTAG)
(USES FIFO)
CLEAR-ON-READ
INTERRUPT (1)
N/A
AVERAGING
INTERRUPTS
DATA TAGGING
N/A
APERTURE SETTING (1)
0x09, 0x0B
N/A
APERTURE
N/A
ADC RESOLUTION AND TIMING
0x02, 0x04, 0x06
ADC RESOLUTION AND TIMING (1)
0x02, 0x04, 0x06
N/A
ADC
PUR AND PUF TIMING
0x07
PUR AND PUF TIMING (1)
0x07
N/A
TDM TIMING
N/A
NOTE 1: THE CONFIGURATION REGISTERS MUST BE SET UP PRIOR TO ENTERING AUTONOMOUS MODE. THESE REGISTERS CANNOT BE ALTERED WHILE AUTONOMOUS MODE IS ACTIVE.
NOTE 2: COMMANDS RECEIVED WHILE AUTONOMOUS MODE IS ACTIVE ARE IGNORED (EXCEPT READBACK COMMANDS). DURING AUTONOMOUS MODE ALL SCAN ACTIVITIES ARE
CONTROLLED BY THE MAX11800/MAX11801, BASED ON THE SETTINGS OF THE CONFIGURATION REGISTERS. ALL MEASUREMENT RESULTS ARE STORED IN THE ON-CHIP FIFO.
TINT AND SCANP TIMING (1)
0x08
N/A
AUTONOMOUS TIMING
MEASUREMENTS
TIRQ
0x01
TIRQ (1)
0x01
Figure 3a. MAX11800/MAX11801 Operation Modes