MAX11803 Maxim Integrated Products, MAX11803 Datasheet - Page 44

• Manufacturer Part Number: MAX11803
• Description: (MAX11800 - MAX11803) Ultra-Small Resistive Touch-Screen Controllers
• Manufacturer: Maxim Integrated Products

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Low-Power, Ultra-Small Resistive Touch-Screen
Controllers with I
Use the readback command 0x50 to read back available
FIFO data in autonomous conversion modes (AUTO = 1)
(MAX11800/MAX11801). The oldest available data is
read out first. Data blocks vary from 32 to 64 bits in
length, depending on the scan mode selected. Reading
back longer than one block results in reading back the
next available block. The end-of-file indicator is read
back when no unread data is available in the FIFO. This
command does not autoincrement and the register
address does not advance beyond 0x50. See the FIFO
Data Block Readback Structure section for more details.
Use the readback commands 0x52 to 0x5B to read
back available measurement data gathered in direct
Table 18. Status and Configuration Registers
44
HEX
0Ah
0Bh
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
______________________________________________________________________________________
R6 R5 R4 R3 R2 R1 R0 ACCESS
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Data Readback Commands
0
0
0
0
0
0
0
0
1
1
1
1
Autonomous Conversion Mode
0
0
0
0
1
1
1
1
0
0
0
0
Direct Conversion Mode
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
2
R
C/SPI Interface
PAIRABLE
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
conversion mode (AUTO = 0). Random data access is
supported within this register space and the commands
autoincrement up to register 0x5B. The register
address does not advance beyond register 0x5B.
Attempting to read back a pending conversion results
in data being tagged invalid. See the Direct Conversion
Mode Operations section for more details.
The panel setup and conversion commands are not
pairable in write mode as each command modifies the
panel setting both during and after the command,
based on conversion executions and CONT bit set-
tings. All direct conversion commands modify the
expected I
streamlining protocol. Table 21 shows the resulting
read register settings by command type applicable to
I
2
AUTOINCREMENT
C variants.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
2
C read register location to support the data
LENGTH
DATA
8
8
8
8
8
8
8
8
8
8
8
8
General status
General configuration
Measurement resolution
configuration
Measurement averaging
configuration
ADC sample time
configuration
Panel setup times
configuration
ADC delay initial conversion
configuration
Touch-detect pullup times
configuration
Autonomous mode timing
configuration (MAX11800/
MAX11801)
Aperture settings (auto)
configuration (MAX11800/
MAX11801)
Auxiliary measurement
configuration
Operating mode
configuration
FUNCTION