EM73P362
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
LCD frame frequency : According to the drive method to set the frame frequency.
Driving method
1/3 duty
1/2 duty
Frame frequency (Hz)
86 x (3/3) = 86
86 x (3/2) = 129
86
Static
LCD drive voltage
When the power supply is 1.5V, the VEE is connected a capacitor to VSS and the VA is connected a
capacitor to VB for the voltage doubler. The output of VEE is 2 x 1.5V for LCD bias voltage.
VA
VB
VEE
VEE2
VDD
VSS
0.1uF
0.1uF
1.5V
PROGRAM EXAMPLE
LDIA
OUTA
LDIA
OUTA
:
#0001B
P27
#1100B
P27
; set LCD mode 1/3 duty 1/2 bias
; enable LCD
:
* This specification are subject to be changed without notice.
20
11.1.2001
ELAN [ ELAN MICROELECTRONICS CORP ]
