LC587008, 587006, 587004
Continued from preceding page.
Pin
COM1
COM2
COM3
COM4
I/O
Output
QIP-80
Pin No.
2
1
80
79
Function
LCD panel drive common polarity outputs
The table below shows how these pins are used depending on the duty
used. (Values for alternating frequency reflect a typical specification of
32.768 MHz for ø0.)
COM1
COM2
COM3
COM4
Alternation
frequency
Static duty
!
!
!
32 Hz
1/2 duty
!
!
32 Hz
1/3 duty 1/4 duty
!
42.7 Hz
32 Hz
Note: A cross ( ! ) indicates that the pin is not used with that duty type.
Sample Application Circuit
LCD: 1/2 bias – 1/4 duty
Option
At reset
The static drive
waveform is output
during the reset
period.
* There are cases
where the
alternating
frequency stops for
the CF, RC and
external clock
specifications.
(These cases differ
depending on option
specifications.)
No. 4435-7/29