Samsung S3C2440A - Manual (Page 488)

S3C2440A RISC MICROPROCESSOR CAMERA INTERFACE
23-10
CAMERA INTERFACE SPECIAL REGISTERS
SOURCE FORMAT REGISTER
Register Address R/W Description Reset Value
CISRCFMT 0x4F000000 RW Input Source Format Register 0
CISRCFMT Bit Description Initial State
ITU601_656n [31]
0 = ITU-R BT.656 YCbCr 8-bit mode enable
1 = ITU-R BT.601 YCbCr 8-bit mode enable
0
UVOffset [30]
Cb,Cr Value Offset Control.
0 = +0 (normally used) - for YCbCr
1 = +128
- for YUV
0
Reserved [29] This bit is reserved and the value must be 0. 0
SourceHsize [28:16] Source Horizontal Pixel Number (must be multiple of 8) 0
Order422 [15:14]
Input YcbCr order inform for input 8-bit mode
00 = YCbYCr
01 = YCrYCb
10 = CbYCrY
11 = CrYCbY
0
SourceVsize [12:0] Source Vertical Pixel Number 0
Note : We recommend a following sequence for preventing FIFO overflow at first frame of capture operation in CODEC path
<ITU 601 Format>
1. CISRCFMT[31] <- '1'
2. S/W reset
3. Initialize the Camera I/F
4. Start Capturing
<ITU 656 Format>
1. CISRCFMT[31] <- '1'
2. S/W reset
3. Initialize the Camera I/F
4. CISRCFMT[31] <- '0' //for ITU 656 foramt
6. Start Capturing
7. Clear Overflow of codec on First ISR