ADV8003 Hardware Manual
Rev. B, August 2013
352
AVI InfoFrame
Detected
No AVI
InfoFrame
Detected
AVI infoFrame
Detection
Internal Flag
AVI_INFO_RAW
AVI_INFO_ST
AVI_INFO_CLR
set to 1
AVI_INFO_CLR
set to 1
Time taken by
the CPU to clear
AVI_INFO_ST
Time taken by
the CPU to clear
AVI_INFO_ST
Figure 135: AVI_INFO_RAW and AVI_INFO_ST Timing
AVI InfoFrame with
new content detected
New AVI InfoFrame
Detection Internal
Pulse Flag
NEW_AVI_INFO_RAW
NEW_AVI_INFO_ST
NEW_AVI_INFO_CLR
set to 1
Time taken by the
CPU to clear
NEW_AVI_INFO_ST
Time > 2 xtal
periods
Figure 136: NEW_AVI_INFO_RAW and NEW_AVI_INFO_ST Timing
All raw bits have corresponding status bits. The status bits always work in the same manner whether the raw bit is edge or level-sensitive.
Status bits have the following characteristics:
•
Enabled by setting the corresponding interrupt mask bit
•
Always latched and must be cleared by the corresponding clear bit
For a given interrupt; when the interrupt mask bit is set, the interrupt status bit goes high and an interrupt is generated on the INT2 pin if
the interrupt raw bit changes state. To return the interrupt status bit to low, the interrupt clear bit must be set. The status bits, interrupt
mask bit and clear bits for level_sensitive_int and edge_sensitive_int are described here for completeness.
Summary of Contents for ADV8003
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