MAX9665ETP+ Maxim Integrated, MAX9665ETP+ Datasheet - Page 28

• Manufacturer Part Number: MAX9665ETP+
• Description: LCD Gamma Buffers 6/8/10-Channel 10-Bit Nonvolatile Programmable Gamma and VCOM Reference Voltages
• Manufacturer: Maxim Integrated

6/8/10-Channel, 10-Bit, Nonvolatile Programmable
Gamma and VCOM Reference Voltages
For a move (MOV) command, 0x01 should be written into
I
in I
upper 4 bits (7 to 4) designate the source, and the lower
4 bits (3 to 0) destination, per Table 11.
It takes 30ms (typ) and 32ms (max) to move one I
ister to MTP memory. Thus, it needs 400ms (typ) and
450ms (max) to program all I
for VCOM window, VCOM, and gamma.
The command operand and operation registers must
be written to consecutively, otherwise the command
does not execute.
The MAX9665/MAX9666/MAX9667 have a single-wire
interface that is compatible with the MAX1512 interface.
Table 10. Example Commands for MOV
Operation
28
2
Operation: Move Gamma register value to
Gamma MTP memory
Operation: Move VCOM MTP memory to VCOM
register
Operation: Move all register values to MTP
memory
C register 0x00, and the source and destination written
2
C register 0x01. See Table 10 for examples. The
______________________________________________________________________________________
I
2
C REGISTER ADDRESS
2
Single-Wire Interface
C registers to MTP memory
0x00
0x01
0x01
0x01
2
C reg-
0x01
0x45
0x32
0x67
Pulse CTL low for more than 200µs to increment the
DAC setting, which lowers the VCOM level by 1 least-
significant bit (LSB) (Figure 10). Similarly, pulse CTL
high for more than 200µs, which raises the VCOM level
by 1 LSB.
To avoid unintentional VCOM adjustment, the parts are
guaranteed to reject CTL pulses shorter than 20µs. In
addition, to avoid the possibility of a single false pulse
caused by power-up sequencing between DVDD and
CTL, the very first pulse is ignored.
Table 11. Source and Destination
Locations for MOV Command
LOCATION CODE
0b0000
0b0001
0b0010
0b0011
0b0100
0b0101
0b0110
0b0111
VCOM Window Registers
VCOM Window MTP Memory
VCOM Register
VCOM MTP Memory
Gamma Registers
Gamma MTP Memory
All Registers
All MTP Memory
VCOM Adjustment (CTL)
DESCRIPTION