Maxim-integrated MAXQ Family Users Guide: MAXQ2000 Supplement Uživatelský manuál stáhnout pdf (Strana 86)

MAXQ Family User’s Guide:

MAXQ2000 Supplement

1 FRAME (f

FRAME

)

LCD

LCD1

LCD2

GND

SEG1

LCD

LCD1

LCD2

GND

SEG0

LCD

LCD1

LCD2

GND

COM2

LCD

LCD1

LCD2

GND

COM1

LCD

LCD1

LCD2

GND

COM0

LCD

2/3 V

LCD

1/3 V

LCD

GND

-1/3 V

LCD

-2/3 V

LCD

-V

LCD

COM3–SEG1

(ON)

LCD

2/3 V

LCD

1/3 V

LCD

GND

-1/3 V

LCD

-2/3 V

LCD

-V

LCD

COM3–SEG0

(OFF)

LCD

LCD1

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

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