AT91SAM9G45-EKES Atmel, AT91SAM9G45-EKES Datasheet - Page 903

• Manufacturer Part Number: AT91SAM9G45-EKES
• Description: KIT EVAL FOR AT91SAM9G45
• Manufacturer: Atmel
• Series: AT91SAM Smart ARMr
• Type: MCUr

Specifications of AT91SAM9G45-EKES

• Contents: Board
• Processor To Be Evaluated: SAM9G45
• Data Bus Width: 32 bit
• Interface Type: I2C, SPI, UART
• Maximum Operating Temperature: + 50 C
• Minimum Operating Temperature: - 10 C
• Operating Supply Voltage: 1.8 V to 3.3 V
• For Use With/related Products: AT91SAM9G45
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q4626953

Figure 39-6. Three Frame Buffers Application and Memory Mapping
39.4.5
39.4.5.1
6438F–ATARM–21-Jun-10
Codec Path
Color Space Conversion
n+1 is mapped to frame buffer 1, frame n+2 is mapped to Frame buffer 2, further frames wrap. A
codec request occurs, and the full-size 4:2:2 encoded frame is stored in a dedicated memory
space.
Depending on user selection, this module can be bypassed so that input YCrCb stream is
directly connected to the format converter module. If the RGB input stream is selected, this mod-
ule converts RGB to YCrCb color space with the formulas given below:
An example of coefficients is given below:
C
C
Y
C
C
Y
frame n-1
b
r
r
b
=
=
=
=
0.257 R
0.439 R 0.368 G
–
0.148 R
–
LCD
C
C
C
0
3
6
–
–
C
C
C
Codec Request
frame n
+
1
–
4
7
0.504 G
–
–
0.291 G
C
C
C
2
8
5
G
R
B
+
–
+
0.098 B
frame n+1
+
0.071 B
0.439 B
Cb
Cr
Y
off
off
off
+
+
+
16
128
128
frame n+2
Codec Done
frame n+3
Memory Space
Frame Buffer 3
Frame Buffer 0
Frame Buffer 1
ISI config Space
4:2:2 Image
Full ROI
frame n+4
AT91SAM9G45
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