EM78468
8-BIT Microcontroller
1frame
1frame
VDD
VDD
VLCD2
VLCD3
GND
VLCD2
VLCD3
GND
COM0
COM 0
VDD
VDD
VLCD2
VLCD3
GND
VLCD2
VLCD3
GND
COM1
COM2
COM 1
COM 2
VDD
VDD
VLCD2
VLCD3
GND
VLCD2
VLCD3
GND
VDD
VDD
VLCD2
VLCD3
GND
VLCD2
VLCD3
GND
SEG N
SEG N
VDD
VDD
SEG N- COM0
ON
VLCD3
GND
SEG N- COM0
ON
VLCD3
GND
-VLCD3
-VDD
VDD
-VLCD3
-VDD
VDD
SEG N- COM1
OFF
VLCD3
GND
SEG N- COM1
OFF
VLCD3
GND
-VLCD3
-VDD
-VLCD3
-VDD
1/3 bias, 1/3 duty
B type
1/3 bias, 1/3 duty
A type
Fig. 20 LCD Waveform for 1/3 Bias, 1/3 Duty
1frame
1frame
VDD
VDD
VLCD2
COM0
VLCD3
VLCD2
VLCD3
GND
COM0
GND
VDD
VDD
VLCD2
COM1
VLCD3
VLCD2
VLCD3
GND
COM1
COM2
GND
VDD
VDD
VLCD2
VLCD3
GND
COM2
SEG N
VLCD2
VLCD3
GND
VDD
VDD
VLCD2
VLCD3
GND
VLCD2
VLCD3
GND
SEG N
VDD
VDD
SEG N-
COM0
SEG N-
COM0
VLCD3
GND
VLCD3
GND
ON
ON
-VLCD3
-VDD
-VLCD3
-VDD
VDD
VDD
SEG N-
COM1
SEG N-
COM1
VLCD3
GND
VLCD3
GND
OFF
OFF
-VLCD3
-VDD
-VLCD3
-VDD
1/3 bias, 1/4 duty
A type
1/3 bias, 1/4 duty
B type
Fig. 21 LCD Waveform for 1/3 Bias, 1/4 Duty
Product Specification (V1.1) 04.11.2005
• 47
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
