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The resulting Hamming distance between any two code words is four, allowing two error detections and
one error correction. To enable or disable the error-correcting capability, configure the
[1] ECCFVH bit.
NOTE:
The 2-bit errors are detected, but not flagged or corrected. Errors of more than 2 bits are not
corrected or flagged.
lists the F, V, and H protection (error-correction) bits.
Table 6-6. Camera ISP F, V, H Protection (Error-Correction) Bits
F
V
H
P3
P2
P1
P0
0
0
0
0
0
0
0
0
0
1
1
1
0
1
0
1
0
1
0
1
1
0
1
1
0
1
1
0
1
0
0
0
1
1
1
1
0
1
1
0
1
0
1
1
0
1
1
0
0
1
1
1
0
0
0
1
When operating in CCIR-656 mode, data is stored in SDRAM according to the format shown in
when
[11] PACK8 is enabled.
Table 6-7. Camera ISP BT.656 Mode Data Format in SDRAM
8 bit x 4
Pixel3 (Y1/Cr0)
Pixel2 (Cr0/Y1)
Pixel1 (Y0/Cb0)
Pixel0 (Cb0/Y0)
Bit 31
Bit 0
NOTE:
The CCDC outputs the XY code in the SAV and EAV into memory. To eliminate this, users
must set the SPH register field to +1. In addition, the NPH register field must be set to
accurately represent the number of active pixels.
6.2.4.4
Camera ISP CSI1/CCP2 Protocol and Data Formats
The CSI1/CCP2B receiver supports two protocols:
•
MIPI CSI1 protocol
•
CCP2 protocol
The MIPI CSI1 protocol is compatible with the CCP2 protocol with the following constraints:
•
Class 0 CCP2 sensors are used: Data/clock
•
No RAW6 or RAW7 data types
•
No CRC code generation
•
Only one logical channel: Channel 0
•
No DPCM
This section describes CSI1/CCP2B protocol and data formats.
describes the I/O for serial
interface CSI1/CCP2B.
Moreover, the CSI1/CCP2B receiver is a serial interface to an image sensor. Data is taken from pins and
through the configured associated PHY taken to the receiver (for information about initializing and
configuring the CSIPHY, see
, Camera ISP CSIPHY Initialization for Work With
CSI1/CCP2B Receiver). The receiver on its side, can send data to the Video processing hardware or
memory.
The CSI1/CCP2B receiver interface has several image-data operating modes, summarized in
1099
SWPU177N – December 2009 – Revised November 2010
Camera Image Signal Processor
Copyright © 2009–2010, Texas Instruments Incorporated