camisp-182
Transmitter
First transmitted bit
31
0
FIFO
Data mem org
time
YUV422 little endian
u0 u1 u2 u3 u4 u5 u6 u7 y0 y1 y2 y3 y4 y5 y6 y7 v0 v1 v2 v3 v4 v5 v6 v7 y0 y1 y2 y3 y4 y5 y6 y7
y7 y6 y5 y4 y3 y2 y1 y0 v7 v6 v5 v4 v3 v2 v1 v0 y7 y6 y5 y4 y3 y2 y1 y0 u7 u6 u5 u4 u3 u2 u1 u0
Odd lines
Even lines
Picture width = n
P
ic
tu
re
h
e
ig
h
t
…
…
…
Receiver
YUV4:2:2 + VP
t0: VP_DATA[7:0] = [u7 u6 u5 u4 u3 u2 u1 u0]
t1: VP_DATA[7:0] = [y7 y6 y5 y4 y3 y2 y1 y0]
t2: VP_DATA[7:0] = [v7 v6 v5 v4 v3 v2 v1 v0]
t3: VP_DATA[7:0] = [y7 y6 y5 y4 y3 y2 y1 y0]
First two pixels of first odd line are: {y ,v ,u } and {y ,v ,u }
1
1
1
2
1
1
First two pixels of first even line are: {y
,v
,u
} and {y
,v
,u
}
n+1
n+1
n+1
n+2
n+1
n+1
u
1
v
1
y
1
y
2
u
3
y
3
u
n+1
y
n+1
v
n+1
y
n+3
y
n+2
u
n+3
u
1
v
1
y
1
y
2
u
1
v
1
y
1
y
2
Public Version
www.ti.com
Camera ISP Environment
Figure 6-9. Camera ISP CSI1/CCP2 YUV422 Little Endian
The line length sent through the associated configured PHY is a multiple of 32 bits. Furthermore, the line
length is a multiple of 3 x 32 bits and the number of lines is even to correctly finish the pixel
reconstruction.
The line structure is different for odd and even lines. Odd lines transport the U component, while even
lines contain the V component. This is shown in
.
1103
SWPU177N – December 2009 – Revised November 2010
Camera Image Signal Processor
Copyright © 2009–2010, Texas Instruments Incorporated
