GS9090 Data Sheet
All bits, with the exception of the LOCK_ERR, will also be cleared if a change in the
video standard is detected, or under the following conditions:
•
•
LOCKED is asserted LOW
SMPTE_BYPASS is asserted LOW in Manual mode
The whole ERROR_STATUS register, including the LOCK_ERR bit, will be set
LOW during a system reset (RESET = LOW).
In addition to the ERROR_STATUS register, a register called ERROR_MASK is
included to select the specific error conditions that will be detected (Table 3-12).
There is one bit in the ERROR_MASK register for each type of error represented
in the ERROR_STATUS register.
The bits of the ERROR_MASK register will default to '0' after a device reset, thus
allowing all error types to be detected. The host interface may disable individual
error detection by setting the corresponding bit HIGH in this register.
Error conditions are also indicated to the application layer via the status signal pin
DATA_ERROR. This output pin is an inverted logical 'OR'ing of each error status
flag stored in the ERROR_STATUS register. DATA_ERROR is normally HIGH, but
will be set LOW by the device when an error condition that has not been masked
is detected.
Table 3-11: Host Interface Description for Error Status Register
Register Name
Bit
Name
Description
R/W
Default
ERROR_STATUS
Address: 01h
15-7
6
–
Not Used
–
–
0
VD_STD_ERR
Video Standard Error Flag. Set HIGH when a
mismatch between the received SMPTE 352M
packets (version 1 or version 0) and the
calculated video standard occurs.
R
5
4
3
FF_CRC_ERR
AP_CRC_ERR
LOCK_ERR
Full Field CRC Error Flag. Set HIGH when a Full
Field (FF) CRC mismatch has been detected in
Field 1 or 2
R
R
R
0
0
0
Active Picture CRC Error Flag. Set HIGH when an
Active Picture (AP) CRC mismatch has been
detected in Field 1 or 2.
Lock Error Flag. Set HIGH whenever the
LOCKED pin is LOW (indicating the device is not
correctly locked).
2
1
CS_ERR
Checksum Error Flag. Set HIGH when ancillary
data packet checksum error has been detected.
R
R
0
0
SAV_ERR
Start of Active Video Error Flag. Set HIGH when
TRS errors are detected in either 8-bit or 10-bit
TRS words.
0
EAV_ERR
End of Active Video Error Flag. Set HIGH when
TRS errors are detected in either 8-bit or 10-bit
TRS words.
R
0
28201 - 1 July 2005
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