camisp-198
FSC_LC0
LEC_LC0
FSC_LC1
LEC_LC1
Data log chan 1
LSC_LC1
LEC_LC1
Data log chan 1
FSC_LC2
LEC_LC2
LSC_LC2
LEC_LC
2
LSC_LC2
FEC_LC2
LSC_LC0
LEC_LC0
FSC_LC2
LEC_LC2
LSC_LC2
LEC_LC2
LSC_LC2
FEC_LC2
LSC_LC0
FEC_LC0
LSC_LC1
FEC_LC1
Data log chan 0
Data log chan 0
Data log chan 0
Data log chan 1
Data log chan 2
Data log chan 2
Data log chan 2
Data log chan 2
Data log chan 2
Data log chan 2
CRC+pad
Muxing at
frame level
Muxing at
line level
CRC+pad
CRC+pad
CRC+pad
CRC+pad
CRC+pad
CRC+pad
CRC+pad
CRC+pad
CRC+pad
CRC+pad
CRC+pad
Public Version
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Camera ISP Functional Description
As shown in
, the CCP2B receiver monitors the channel identification number and
demultiplexes the interleaved data streams. The CCP2B receiver supports up to four concurrent logical
channels.
The logical channel identifier is coded in the upper 4 bits (bits 4 to 7) of the last byte of the
synchronization codes.
summarizes the default logical channel values used for each channel.
The CCP2B programming model allows these values to be overwritten.
Table 6-23. Camera ISP CSI1/CCP2B Logical Channel Values in Synchronization Codes
Logical Channel
Value
Logical channel 0
0x0
Logical channel 1
0x1
Logical channel 2
0x2
Logical channel 3
0x3
Logical channel 4
0x4
Logical channel 5
0x5
Logical channel 6
0x6
Logical channel 7
0x7
Muxing
The logical channels are interleaved at the line level or at the frame level.
shows the possible
situations. Each logical channel can use different data formats.
Figure 6-62. Camera ISP CSI1/CCP2B Muxing
6.4.2.2.5 Camera ISP CSI1/CCP2B Memory Read Channel
The memory channel can perform the following operations:
•
Reads data from memory. It is unpacked and DPCM decompressed if necessary.
•
Can send the data to the Video processing hardware
•
Can send the data back to memory. It can be DPCM compressed and packed before it is sent to
memory.
It cannot receive its input data directly from the sensor, and the logical channels are disabled when the
memory channel is enabled.
summarizes supported modes for memory-to-memory operations.
1165
SWPU177N – December 2009 – Revised November 2010
Camera Image Signal Processor
Copyright © 2009–2010, Texas Instruments Incorporated