MAX11800_10 Datasheet, PDF (46/57 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
Panel Setup and
Measurement Commands
TSC conversion commands are only to be used in
direct conversion mode (AUTO = 0). Conversion com-
mands issued during autonomous mode are ignored.
All panel setup and measurement operations are auto-
mated when in autonomous mode (AUTO = 1).
Commands must be issued in write mode to be execut-
ed. There are two types of commands: panel setup reg-
isters (0x6x) and measurement/conversion registers
(0x7x). All measurement commands indicate that the
ADC is used and the ADC can begin to power up once
the 0x7x header has been recognized. All measure-
ment commands modify the target data register upon
the conclusion of the measurement command. The
CONT bit impacts the setup of the panel and ADC fol-
lowing the command. For panel setup commands and
combined commands, the user setting of this bit (R0) is
ignored. For these commands, the internal assumption
is shown in parentheses in Table 22.
The CONT bit impacts the setup of the panel and/or ADC
following the command (see command descriptions for
details). For some commands, the user setting of this bit
(R0) is ignored; for these commands the internal
assumption is shown in parentheses in Tables 8 and 22.
By definition, panel setup and measurement com-
mands are NOT pairable in write mode as each com-
mand modifies the panel setting both during the
command and after it (based on conversion executions
and CONT bit settings).
Table 22. Measurement Commands
HEX R6 R5 R4 R3 R2 R1
R0
ACCESS PAIRABLE
COMMAND
LENGTH
OPERATION
7xh 1 1 1 0 0 0
(0)
Write
No
7xh 1 1 1 0 0 1
(0)
Write
No
7xh 1 1 1 0 1 0
(0)
Write
No
8
X, Y = combined measurement
8
X, Y, Z1 = combined measurement
8
X, Y, Z1, Z2 = combined measurement
7xh 1 1 1 0 1 1
(0)
Write
No
7xh 1 1 1 1 0 0 CONT Write
No
7xh 1 1 1 1 0 1 CONT Write
No
7xh 1 1 1 1 1 0 CONT Write
No
7xh 1 1 1 1 1 1 CONT Write
No
8
AUX = measurement
8
X = measurement
8
Y = measurement
8
Z1 = measurement
8
Z2 = measurement
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