26 LCD CONTROLLER (LCDC)
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
26-45
LCDC Display Mode Register (LCDC_DISPMOD)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
LCDC Display
Mode Register
(LCDC_
DISPMOD)
0x302060
(32 bits)
D31
PANELSEL Panel type select
1 TFT
0 STN
0
R/W
D30
COLOR
Color/mono select
1 Color
0 Mono
0
R/W
D29
FPSHIFT_
MSK
FPSHIFT mask enable
1 Enable
0 Disable
0
R/W
D28
–
reserved
–
–
–
0 when being read.
D27–26 DWD[1:0]
LCD panel data width select
DWD[1:0]
Data width
0x0 R/W
0x3
0x2
0x1
0x0
8 bits (fmt2)
reserved
8 bits (fmt1)
4 bits
D25
SWINV
Software video invert
1 Invert
0 Normal
0
R/W
D24
BLANK
Display blank enable
1 Blank
0 Normal
0
R/W
D23–8 –
reserved
–
–
–
0 when being read.
D7
FRMRPT
Frame repeat for EL panel
1 Repeat
0 Not repeat
0
R/W
D6–5 –
reserved
–
–
–
0 when being read.
D4
LUTPASS
LUT bypass mode select
1 Bypass
0 Use
1
R/W
D3
–
reserved
–
–
–
0 when being read.
D2–0 BPP[2:0]
Bit-per-pixel select
BPP[2:0]
bpp
0x0 R/W
0x7
0x6
0x5
0x4
0x3
0x2
0x1
0x0
reserved
24 bpp
16 bpp
12 bpp
8 bpp
4 bpp
2 bpp
1 bpp
D31
PANELSEL: Panel Type Select Bit
Selects the type of connected LCD panel (STN or TFT).
1 (R/W): TFT panel
0 (R/W): STN panel (default)
When TFT panel is selected, COLOR and DWD[1:0] settings are disabled.
D30
COLOR: Color/Mono Select Bit
Selects the type of connected LCD panel (color or monochrome).
1 (R/W): Color panel
0 (R/W): Monochrome panel (default)
D29
FPSHIFT_MSK: FPSHIFT Mask Enable Bit
Enables the FPSHIFT mask (effective only for STN monochrome LCD panels and HR-TFT panels).
1 (R/W): Enabled
0 (R/W): Disabled (default)
When FPSHIFT_MSK is set to 1, the FPSHIFT signal is masked and is not output during the non-
display period. When FPSHIFT_MSK is set to 0, the FPSHIFT signal is output even during the non-
display period. This setting is effective only for STN monochrome LCD panels (COLOR = 0) and HR-
TFT panels. When an STN color LCD panel is used, the FPSHIFT signal is always masked regardless
of the setting of this bit.
D28
Reserved
D[27:26] DWD[1:0]: LCD Panel Data Width Select Bits
Selects the STN LCD panel’s data width and format.
10.3 Data Width Selection of STN Panels
Table 26.
COLOR
DWD[1:0]
Data width
1
0x3
Color single 8-bit passive LCD panel (format 2)
0x2
Reserved
0x1
Color single 8-bit passive LCD panel (format 1)
0x0
Color single 4-bit passive LCD panel
0
0x3
Monochrome single 8-bit passive LCD panel
0x2
Reserved
0x1
Monochrome single 8-bit passive LCD panel
0x0
Monochrome single 4-bit passive LCD panel