Control Of Lcd Driver - Epson S1C88650 Technical Manual

5.11.7 Control of LCD driver

Table 5.11.7.1 shows the LCD driver control bits.
Address Bit Name
00FF03 D7 –
–
D6 – –
D5 –
–
D4 – –
D3 –
–
D2 – –
D1 VDSEL
Power source select for LCD voltage regulator
D0 DBON Power voltage booster On/Off control
00FF10 D7 HLMOD
Heavy load protection mode
D6 SEGREV Reverse SEG assignment
D5 –
R/W register
D4 – R/W register
D3 –
R/W register
D2 DTFNT LCD dot font selection
D1 LDUTY1
LCD drive duty selection
D0 LDUTY0
00FF11 D7 FRMCS
D6 DSPAR
LCD display memory area selection
D5 LCDC1 LCD display control
D4 LCDC0
D3 LC3
D2 LC2
D1 LC1
D0 LC0
LDUTY0, LDUTY1: 00FF10H•D0, D1
Selects the drive duty.
LDUTY1
1
1
0
0
At initial reset, LDUTY is set to "10" (1/16 duty).
S1C88650 TECHNICAL MANUAL
5 PERIPHERAL CIRCUITS AND THEIR OPERATION (LCD Driver)
Table 5.11.7.1 LCD driver control bits
Function
LDUTY1 LDUTY0
1 1
1 0
0 1
0 0
LCD frame signal source clock selection
LCD display
LCDC1 LCDC0
1 1 All LCDs lit
1 0 All LCDs out
0 1 Normal display
0 0 Drive off
LCD contrast adjustment
LC3 LC2 LC1 LC0
1 1 1 1
1 1 1 0
: : : :
0 0 0 0
Table 5.11.7.2 Setting drive duty
LDUTY0 Duty
1 Not allowed
0 1/16 COM0–COM15
1 1/32 COM0–COM31
0 1/8
1
–
–
–
–
–
–
V
D2
On
On
Reverse
1
1
1
12 12
Duty
Not allowed
1/16
1/32
1/8
PTM
Display area 1 Display area 0
Contrast
Dark
:
:
Light
Common Segment
terminal terminal
– –
SEG0–SEG125
SEG0–SEG125
COM0–COM7 SEG0–SEG125
EPSON
0 SR R/W Comment
–
– Constantly "0" when
–
– being read
–
–
–
–
–
–
–
–
0 R/W
V
DD
0 R/W
Off
0 R/W
Off
0 R/W
Normal
0 R/W
0 Reserved register
0 R/W
0
0 R/W
0
0 R/W
16 16/5 8
1 R/W
0 R/W
0 R/W
f
OSC1
0 R/W
These bits are reset
0 R/W
to (0, 0) when
SLP instruction
is executed.
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
Maximum number
of display dots
–
2,016 dots
4,032 dots
1,008 dots
121