MAX11803 Maxim Integrated Products, MAX11803 Datasheet - Page 43

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

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4) I
5) Panel Setup Commands: 6Ah to 6Fh
6) Measurement Commands: 70h to 7Fh
The commands to read or write the user-accessible
registers are always the same. However, the data for-
mat varies based on whether using an SPI or I
face. Tables 16 and 17 show the differences between
SPI and I
ded in the 8-bit byte and always occupies the LSB
Table 16. SPI Command and Data Format: 8 Bits
Table 17. I
Low-Power, Ultra-Small Resistive Touch-Screen
• Sets up panel prior to making X, Y, Z1, or Z2 mea-
• Direct conversion mode only (MAX11801/
• Allows reading measurement results when in DCM
• Performs specified measurement (X, Y, Z1, and/or
2
BIT 7
surements
C Readback Registers: 52h to 58h
BIT 7
MAX11803)
Z2)
0
R6
2
C protocols. For SPI, the R/W bit is embed-
2
C Command and Data Format: 8 Bits Plus ACK
BIT 6
R6
______________________________________________________________________________________
BIT 6
R5
BIT 5
R5
BIT 5
Controllers with I
R4
BIT 4
Command or Data
Command or Data
R4
2
BYTE
C inter-
BIT 4
R3
BIT 3
R3
BYTE
position. For I
lowed by an acknowledge bit, for a total of 9 bits. The
MSB in I
the MSB is ignored internal to the MAX11800–
MAX11803, so setting it to 0 or 1 has no effect.
The status and configuration registers are located in
block 0x00 to 0x0B. See Table 18. All user-configura-
tion register write mode operations are pairable within
the SPI/I
under a single instruction with a register byte followed
by a data. All user-configuration read-mode operations
support autoincrement. For example, if location 0x00 is
read back and more clock pulses are issued, readback
will proceed through location 0x01 and so forth. The
user should set all configuration registers to the desired
values before issuing direct conversion operations or
placing MAX11800/MAX11801 in autonomous mode.
BIT 3
R2
BIT 2
R2
2
2
C interface. Multiple locations can be written
C format is always 0. In write mode, for I
2
C, the protocol is always 8-bit byte fol-
BIT 2
2
R1
Status and Configuration Registers
BIT 1
C/SPI Interface
R1
(CONT)
(CONT)
BIT 1
BIT 0
R0
R0
BIT 0
ACK
R/
BIT
1/0
1/0
1/0
2
43
C,