UPD789304 Datasheet, PDF (26/64 Pages) NEC – 8-BIT SINGLE-CHIP MICROCONTROLLER

Figure 5-11. Block Diagram of LCD Controller/Driver
LCD clock control
register 0 (LCDC0)
LCDC03 LCDC02 LCDC01 LCDC00
2
2
LCD display mode
register 0 (LCDM0)
LCDON0 VAON0 LIPS0 LCDM02 LCDM01 LCDM00
Internal bus
LCD voltage amplifier
control register 0 (LCDVA0)
GAIN
FA00H
76543210
Display data memory
··········
FA17H
76543210
3
fCLK/2⁵
fCLK/2⁶
fCLK/2⁷
fXT
Prescaler
fLCD
2⁶
fLCD
2⁷
fLCD
2⁸
fLCD
2⁹
LCD _fLCD
clock
selector
Voltage
amplifier circuit
Timing
controller
3210
Selector
LCDON0
3210
Selector
LCDON0
Remark fCLK: fX or fCC
LCD drive voltage controller
Common driver
CAPH CAPL VLC2
VLC1
VLC0
COM0 COM1 COM2 COM3
Segment
driver
Segment
driver
··········
S0
S23