Datasheet

Table Of Contents
Section 21 LCD Controller/Driver
Rev. 2.00 Jul. 04, 2007 Page 463 of 692
REJ09B0309-0200
21.3.4 LCD Trimming Register (LTRMR)
LTRMR adjusts the 3-V constant-voltage used for LCD drive power supply and the output voltage
of 3-V constant-voltage power supply circuit.
Bit Bit Name
Initial
Value
R/W Description
7
6
5
4
TRM3
TRM2
TRM1
TRM0
0
0
0
0
R/W
R/W
R/W
R/W
Output Voltage Adjustment of 3-V Constant-Voltage
Power Supply Circuit*
1
*
2
By adjusting reference voltage that generates 3-V
constant voltage, LCD drive power supply can be set to
3 V. Following values* indicate the voltage of the V1
pin. Set this register so that the voltage on the V1 pin
should be 3 V.
0000: ±0 V 1000: 0.48 V
0001: -0.06 V 1001: 0.42 V
0010: -0.12 V 1010: 0.36 V
0011: -0.15 V 1011: 0.30 V
0100: -0.21 V 1100: 0.24 V
0101: -0.24 V 1101: 0.18 V
0110: -0.30 V 1110: 0.12 V
0111: -0.33 V 1111: 0.06 V
3 — 1 Reserved
This bit is always read as 1 and cannot be modified.