Specifications

I-48 EPSON S1C62N82 TECHNICAL HARDWARE
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (LCD Driver)
The S1C62N82 Series members allow software setting of the
LCD static drive. This function enables easy adjustment
(cadence adjustment) of the oscillation frequency of the OSC
circuit.
The procedure for executing of the LCD static drive is as
follows:
➀ Write 1 to the CSDC register at address 0FBH D3.
➁ Write the same value to all registers corresponding to
COM0–COM7 of the display memory.
- Even in case 1/4 duty were selected, when SEG terminal is set
to static driving, set the same values on all the display memo-
ries corresponding to COM4–COM7.
- For cadence adjustment, set the display data including display
data corresponding to COM7, so that all the LCD segments go
on.
Figures 4.6.3 and 4.6.4 shows the drive waveform for static
drive.
Switching between
dynamic and static
drive
Fig. 4.6.4
LCD static drive
waveform (1/8 duty)
Fig. 4.6.3
LCD static drive
waveform (1/4 duty)
SEG
0–41
COM
0–3
Frame frequency
LCD lighting status
COM0
COM1
COM2
COM3
SEG0–41
-V
-V
-V
-V
-V
-V
-V
-V
-V
-V
-V
-V
Not lit
Lit
DD
L1
L2
L3
DD
L1
L2
L3
DD
L1
L2
L3
Note
SEG
0–37
COM
0–7
Frame frequency
LCD lighting status
COM0
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM0
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM0
COM1
COM2
COM3
COM4
COM5
COM6
COM7
-V
-V
-V
-V
-V
-V
-V
-V
-V
-V
-V
-V
-V
-V
-V
Not lit
Lit
DD
L1
L2
L3
L4
DD
L1
L2
L3
L4
DD
L1
L2
L3
L4