
Public Version
Camera ISP Register Manual
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31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
RESERVED
RESERVED
RESERVED
PRV_WBL_OVF
RSZ1_WBL_OVF
RSZ2_WBL_OVF
RSZ3_WBL_OVF
RSZ4_WBL_OVF
CSI2A_WBL_OVF
CCDC_WBL_OVF
H3A_AF_WBL_OVF
CCDCPRV_2_RSZ_OVF
H3A_AEAWB_WBL_OVF
CSI1_CCP2B_CSI2C_WBL_OVF
Bits
Field Name
Description
Type
Reset
31:27
RESERVED
Write 0's for future compatibility.
RW
0x00
Reads returns 0.
26
CSI1_CCP2B_CSI2C_WBL_OVF CSI1/CCP2B or CSI2C Write buffer memory overflow
RW
0
All DUs have been filled up: overflow.Software has to
write 1 to clear the bit.
Read 0x0: No overflow
Read 0x1: Overflow
25
CSI2A_WBL_OVF
CSI2A Write buffer memory overflow
RW
0
All DUs have been filled up: overflow. Software has to
write 1 to clear the bit.
Read 0x0: No overflow
Read 0x1: Overflow
24
CCDCPRV_2_RSZ_OVF
CCDC/PRV to RESIZER input overflow
RW
0
This bit is set if the RESIZER input source is set to
CCDC/PREVIEW engine when the active data (to be
resized) has already showed up at the resizer interface.
In such a case, resizing for this frame cannot take place
and the bit is set. This scenario can happen when a
resize of > 4x is required per frame. Therefore, the
REISZER needs to operate in two passes. In the first
pass the input data from CCDC/PREVIEW is directly
resized and written to memory. In the second pass, the
resized data from the first pass is resized again. The next
frame from the CCDC/PREVIEW engine should only start
after the second pass on the previous frame is complet.
This bit indicated the failure status.
Software has to write 1 to clear the bit.
Note: Ignore the behavior of this field when
[28] INPSRC = 0x1 (when data comes from
memory).
Read 0x0: No overflow
Read 0x1: Overflow
23
CCDC_WBL_OVF
CCDC Write buffer memory overflow
RW
0
All DUs have been filled up: overflow. Software has to
write 1 to clear the bit.
Read 0x0: No overflow
Read 0x1: Overflow
22
PRV_WBL_OVF
PREVIEW Write buffer memory overflow
RW
0
All DUs have been filled up: overflow. Software has to
write 1 to clear the bit.
Read 0x0: No overflow
Read 0x1: Overflow
1478
Camera Image Signal Processor
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated