Lcd8B Control Register; Lcd8B Timing Control Register 1 - Epson S1C17W18 Technical Manual

LCD8CLK.
CLKDIV[2:0] bits
0x7
0x6
0x5
0x4
0x3
0x2
0x1
0x0
(Note) The oscillation circuits/external input that are not supported in this IC cannot be
selected as the clock source.
Note: The LCD8CLK register settings can be altered only when the LCD8CTL.MODEN bit = 0.

LCD8B Control Register

Register name Bit
LCD8CTL 15–8 –
7–2 –
1
0
Bits 15–2 Reserved
Bit 1 LCDDIS
This bit enables the SEG/COM-pin discharge operations when "Display off" is selected.
1 (R/W): Enable SEG/COM-pin discharge operations
0 (R/W): Disable SEG/COM-pin discharge operations
Setting this bit to 1 configures the SEG/COM pins to output a low level when "Display off" is select-
ed. Setting to 0 configures the SEG/COM pins to enter Hi-Z status when "Display off" is selected.
Bit 0 MODEN
This bit enables the LCD8B operations.
1 (R/W): Enable LCD8B operations
0 (R/W): Disable LCD8B operations
Setting this bit to 1 starts supplying the operating clock to LCD8B.
Note: If the LCD8CTL.MODEN bit is altered from 1 to 0 while the LCD panel is displaying, the LCD
display is automatically turned off and the LCD8DSP.DSPC[1:0] bits are set to 0x0. Also the
LCD voltage regulator is automatically turned off and the LCD8PWR.VCEN bit is set to 0.

LCD8B Timing Control Register 1

Register name Bit
LCD8TIM1 15–12 –
11–8 FRMCNT[3:0]
7–3 –
2–0 LDUTY[2:0]
Bits 15–12 Reserved
Bits 11–8 FRMCNT[3:0]
These bits set the frame frequency. For more information, refer to "Frame Frequency."
Bits 7–3 Reserved
Bits 2–0 LDUTY[2:0]
These bits set the drive duty. For more information, refer to "Drive Duty Switching."
S1C17W18 TECHNICAL MANUAL
(Rev. 1.2)
Table 18.8.1 Clock Source and Division Ratio Settings
0x0
IOSC
Reserved
1/128
1/64
1/32
1/16
1/8
1/4
Bit name Initial
0x00
0x00
LCDDIS 0
MODEN 0
Bit name Initial
0x0
0x3
0x00
0x7
Seiko Epson Corporation
LCD8CLK.CLKSRC[1:0] bits
0x1 0x2
OSC1 OSC3
1/1 Reserved
1/128
1/64
1/32
1/16
1/8
1/4
Reset R/W
– R –
– R
H0 R/W
H0 R/W
Reset R/W
– R –
H0 R/W
– R
H0 R/W
18 LCD DRIVER (LCD8B)
0x3
EXOSC
1/1
Remarks
Remarks
18-23