Datasheet

CHAPTER 15 LCD CONTROLLER/DRIVER
380 User’s Manual U18698EJ1V0UD
15.3 Registers Controlling LCD Controller/Driver
The following five registers are used to control the LCD controller/driver.
• LCD mode register (LCDMD)
• LCD display mode register (LCDM)
• LCD clock control register (LCDC0)
• Port function register 2 (PF2)
• Port function register ALL (PFALL)
(1) LCD mode register (LCDMD)
LCDMD sets the LCD drive voltage generator.
LCDMD is set using a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets LCDMD to 00H.
Figure 15-2. Format of LCD Mode Register
Address: FFB0H After reset: 00H R/W
Symbol 7 6 5 4 3 2 1 0
LCDMD 0 0 MDSET1 MDSET0 0 0 0 0
MDSET1 MDSET0 LCD drive voltage generator selection
0 0 External resistance division method
0 1 Internal resistance division method (no step-down transforming) (Used when VLCD = VDD)
1 1 Internal resistance division method (step-down transforming) (Used when VLCD = 3/5VDD)
Other than above Setting prohibited
Caution Bits 0 to 3, 6 and 7 must be set to 0.