S3C44B0X

Manufacturer Part NumberS3C44B0X
DescriptionBGA
ManufacturerSamsung
S3C44B0X datasheets
 

Specifications of S3C44B0X

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S3C2400 RISC MICROPROCESSOR
FRAME BUFFER START ADDRESS 1 REGISTER
Register
Address
LCDSADDR1
0X14A00014
LCDSADDR1
Bit
LCDBANK
[27:21]
These bits indicate A[28:22] of the bank location for the video buffer in
the system memory. LCDBANK value can not be changed even when
moving the view port. LCD frame buffer should be inside aligned 4MB
region, which ensures that LCDBANK value will not be changed when
moving the view port. So, using the malloc() function the care should
be taken.
LCDBASEU
[20:0]
For dual-scan LCD: These bits indicate A[21:1] of the start address of
the upper address counter, which is for the upper frame memory of
dual scan LCD or the frame memory of single scan LCD.
For single-scan LCD: These bits indicate A[21:1] of the start address
of the LCD frame buffer.
FRAME Buffer Start Address 2 Register
Register
Address
LCDSADDR2
0X14A00018
LCDSADDR2
Bit
LCDBASEL
[20:0]
For dual-scan LCD: These bits indicate A[21:1] of the start address of
the lower address counter, which is used for the lower frame memory
of dual scan LCD.
For single scan LCD: These bits indicate A[21:1] of the end address
of the LCD frame buffer.
LCDBASEL = ((the fame end address) >>1) + 1
NOTE:
Users can change the LCDBASEU and LCDBASEL values for scrolling while LCD controller is turned on. But,
users
must not change the LCDBASEU and LCDBASEL registers at the end of FRAME by referring to the LINECNT field
in LCDCON1 register. Because of the LCD FIFO fetches the next frame data prior to the change in the frame.
So, if you change the frame, the pre-fetched FIFO data will be obsolete and LCD controller will display the incorrect
screen. To check the LINECNT, interrutpt should be masked. If any interrupt is executed just after reading
LINECNT, the read LINECNT value may be obsolete because of the execution time of ISR(interrupt service routine).
R/W
Description
R/W
STN/TFT: Frame buffer start address 1 register
Description
R/W
Description
R/W
STN/TFT: Frame buffer start address 2 register
Description
= LCDBASEU +
(PAGEWIDTH+OFFSIZE)x(LINEVAL+1)
LCD CONTROLLER
Reset Value
0x00000000
Initial State
0x00
0x000000
Reset Value
0x00000000
Initial State
0x0000
15-29