Figure 19. 1/4 duty drive example waveform timing, Maxq family user’s guide: maxq2000 supplement – Maxim Integrated MAXQ Family Users Guide: MAXQ2000 Supplement User Manual
Page 86
MAXQ Family User’s Guide:
MAXQ2000 Supplement
1 FRAME (f
FRAME
)
V
LCD
V
LCD1
V
LCD2
GND
SEG1
V
LCD
V
LCD1
V
LCD2
GND
SEG0
V
LCD
V
LCD1
V
LCD2
GND
COM2
V
LCD
V
LCD1
V
LCD2
GND
COM1
V
LCD
V
LCD1
V
LCD2
GND
COM0
V
LCD
2/3 V
LCD
1/3 V
LCD
GND
-1/3 V
LCD
-2/3 V
LCD
-V
LCD
COM3–SEG1
(ON)
V
LCD
2/3 V
LCD
1/3 V
LCD
GND
-1/3 V
LCD
-2/3 V
LCD
-V
LCD
COM3–SEG0
(OFF)
V
LCD
V
LCD1
V
LCD2
GND
COM3
Figure 19. 1/4 Duty Drive Example Waveform Timing
LCD Controller Example: Initializing the LCD Controller
move LCRA, #03E0h
; LCRA.FRM = 7 Set up frame frequency.
; LCRA.LCCS = 1 Set clock source to HFClk / 128.
; LCRA.DUTY = 0 Set up static duty cycle.
; LCRA.LRA = 0 Set R-adj to 0.
; LCRA.LRIGC = 1 Ground Radj resistor internally.
move LCFG, #0F3h
; LCFG.PCF = 0x0F Set up all segments as outputs.
; LCFG.OPM = 1 Set to normal operation mode.
; LCFG.DPE = 1 Enable display.
Maxim Integrated
86