26 LCD CONTROLLER (LCDC)
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
26-47
Main Window Display Start Address Register (LCDC_MAINADR)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
Main Window
Display Start
Address
Register
(LCDC_
MAINADR)
0x302070
(32 bits)
D31–0 MW_START
[31:0]
Main window start address
MW_START31 = MSB
MW_START0 = LSB
0x0 to 0xfffffffc
(Areas 3–5, 7–10, 13–16, and
19–22)
0x0 R/W
D[31:0] MW_START[31:0]: Main Window Start Address Bits
Sets the main window display start address. (Default: 0x0)
Note that a word boundary address (A[1:0] = 0b00) in the IVRAM or external VRAM must be speci-
fied to this register.
Main Screen Address Offset Register (LCDC_MAINOFS)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
Main Screen
Address Offset
Register
(LCDC_
MAINOFS)
0x302074
(32 bits)
D31–12 –
reserved
–
–
–
0 when being read.
D11–0 MW_OFS
[11:0]
Main screen address offset
Main screen width (pixels)
×
bpp/32
0x0 R/W
D[31:12] Reserved
D[11:0] MW_OFS[11:0]: Main Screen Address Offset Bits
Sets the main virtual screen width in words. (Default: 0x0)
The set value is calculated as follows:
MW_OFS[11:0] = virtual screen width in pixels
×
bpp / 32
See “Main screen address offset for virtual screen” in Section 26.6.2 for more information on the virtual
screen and the configurations.
Sub-window Display Start Address Register (LCDC_SUBADR)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
Sub-window
Display Start
Address
Register
(LCDC_
SUBADR)
0x302080
(32 bits)
D31–0 SW_START
[31:0]
Sub-window start address
SW_START31 = MSB
SW_START0 = LSB
0x0 to 0xfffffffc
(Areas 3–5, 7–10, 13–16, and
19–22)
0x0 R/W
D[31:0] SW_START[31:0]: Sub-Window Start Address Bits
Sets the sub-window display start address. (Default: 0x0)
Note that a word boundary address (A[1:0] = 0b00) in the IVRAM or external VRAM must be speci-
fied to this register.
Sub-Screen Address Offset Register (LCDC_SUBOFS)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
Sub-screen
Address Offset
Register
(LCDC_
SUBOFS)
0x302084
(32 bits)
D31–12 –
reserved
–
–
–
0 when being read.
D11–0 SW_OFS
[11:0]
Sub-screen address offset
Sub-screen width (pixels)
×
bpp/32
0x0 R/W
D[31:12] Reserved
D[11:0] SW_OFS[11:0]: Sub-Screen Address Offset Bits
Sets the sub-virtual screen width in words. (Default: 0x0)
The set value is calculated as follows:
SW_OFS[11:0] = virtual screen width in pixels
×
bpp / 32
See “Main screen address offset for virtual screen” in Section 26.6.2 for more information on the virtual
screen and the configurations.