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CHAPTER 16 LCD CONTROLLER/DRIVER
Preliminary User’s Manual U14581EJ3V0UM00
16.3 LCD Controller/Driver Control Registers
The following two types of registers are used to control the LCD controller/driver.
• LCD display mode register (LCDM)
• LCD display control register (LCDC)
(1) LCD display mode register (LCDM)
This register sets display operation enabling/disabling, the LCD clock, and frame frequency.
LCDM is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input clears LCDM to 00H.
Figure 16-3. LCD Display Mode Register (LCDM) Format
Address: FFB0H After Reset: 00H R/W
Symbol
7
6
5
4
3
2
1
0
LCDM
LCDON
LCDM6
LCDM5
LCDM4
0
0
0
0
LCDON
LCD Display Enable/Disable
0
Display off (all segment outputs are non-select signal outputs)
1
Display on
LCDM6
LCDM5
LCDM4
LCD Clock Selection (f
X
= 8.38 MHz)
0
0
0
f
X
/2
17
(64 Hz)
0
0
1
f
X
/2
16
(128 Hz)
0
1
0
f
X
/2
15
(256 Hz)
0
1
1
f
X
/2
14
(512 Hz)
Other than above
Setting prohibited
Remark f
X
: Main system clock oscillation frequency
Содержание mPD780851
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