Lcd24A Timing Control Register 2; Lcd24A Power Control Register - Epson S1C17W22 Technical Manual

18 LCD DRIVER (LCD24A)

LCD24A Timing Control Register 2

Register name Bit
LCD24TIM2 15–10 –
9–8 BSTC[1:0]
7–5 –
4–0 NLINE[4:0]
Bits 15–10 Reserved
Bits 9–8 BSTC[1:0]
These bits select the booster clock frequency for the LCD voltage booster.
f
CLK_LCD24A
Bits 7–5 Reserved
Bits 4–0 NLINE[4:0]
These bits enable the n-line inverse AC drive function and set the number of inverse lines. For more
information, refer to "n-Segment-Line Inverse AC Drive."

LCD24A Power Control Register

Register name Bit
LCD24PWR 15–13 –
12–8 LC[4:0]
7–5 –
4
3
2
1
0
Bits 15–13 Reserved
Bits 12–8 LC[4:0]
These bits set the LCD panel contrast.
Bits 7–5 Reserved
Bit 4 BSTEN
This bit turns the LCD voltage booster on and off.
1 (R/W): LCD voltage booster on
0 (R/W): LCD voltage booster off
For more information, refer to "LCD Power Supply."
18-24
Bit name Initial
0x00
0x1
0x0
0x00
Table 18.8.2 Booster Clock Frequency
LCD24TIM2.BSTC[1:0] bits
0x3
0x2
0x1
0x0
: LCD24A operating clock frequency [Hz]
Bit name Initial
0x0
0x00
0x0
BSTEN 0
BISEL 1
HVLD 0
VCSEL 0
VCEN 0
Table 18.8.3 LCD Contrast Adjustment
LCD24PWR.LC[4:0] bits
0x1f
0x1e
:
0x01
0x00
Seiko Epson Corporation
Reset R/W
– R –
H0 R/W
– R
H0 R/W
Booster clock frequency [Hz]
f /64
CLK_LCD24A
f /32
CLK_LCD24A
f /16
CLK_LCD24A
f /4
CLK_LCD24A
Reset R/W
– R –
H0 R/W
– R
H0 R/W
H0 R/W
H0 R/W
H0 R/W
H0 R/W
Contrast
High (dark)
↑
:
↓
Low (light)
S1C17W22/W23 TECHNICAL MANUAL
Remarks
Remarks
(Rev. 1.3)