EM78860
8-BIT MICRO-CONTROLLER
COM0 COM1 COM2 COM3 COM4 COM5 COM6 COM7 COM8
.. COM15
1/8
1/16
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
x
o
..
..
x
o
x:open,o:select
• SEG signal: The 60 segment signal pins are connected to the corresponding display RAM address 00h to 3Bh.
The high byte and the low byte bit7 down to bit0 are correlated to COM15 to COM0 respectively .
When a bit of display RAM is 1, a select signal is sent to the corresponding segment pin, and when the bit is
0 , a non-select signal is sent to the corresponding segment pin.
• COM, SEG and Select/Non-select signal is shown as following:
com0 ... com7
frame
VDD
V1
V2
V3
VLCD
com0
com1
VDD
V1
V2
V3
VLCD
VDD
V1
V2
V3
com2
VLCD
VDD
V1
V2
V3
VLCD
seg
seg
dark
VDD
V1
V2
V3
VLCD
light
Fig.14 Lcd wave 1/4 bias, 1/8 duty
* This specification are subject to be changed without notice.
20
6.24.1998
ELAN [ ELAN MICROELECTRONICS CORP ]
