Samsung YP-P10 User Manual Page 515

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S3C2440A RISC MICROPROCESSOR CAMERA INTERFACE
23-6
FRAME MEMORY HIRERARCHY
Frame memories consist of four ping-pong memories for each of P and C paths as shown in the Figure 23-6. C-
path ping-pong memories have three element memories – luminance Y, chrominance Cb, and chrominance Cr. If
AHB-bus traffic is not enough for the DMA operation to complete during one horizontal line period, it may lead to mal-
functioning
CAMCLKOUT
Divide
Counter
1/1 ~ 1/16
UPLL
External
Camera
Processor
CAMPCLK
S3C2440A
CAMIF
USB PLL
96 MHz
f
USB
/d
f
USB
MPLL
Variable
Freq.
Divide
Counter
f
mpll
/d
f
mpll
HCLK
a
External MCLK
Normally use
Schmit-
triggered
Level-shifter
Figure 23-5. CAMIF Clock Generation
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