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ADV202 output

Question asked by HankZ on Apr 15, 2013
Latest reply on Apr 15, 2013 by DaveD

When I use ADV202 for JEPG200 compression, the bus size is 32-bit, sometime the

output is a fixed four-byte data like 0xff77be7, 0xff77fbe2, 0xff7ffbe3. Can

you figure out the possible reason for that?

Sometimes the output is a fixed four-byte data, like 0xff77be7, in the data

frame, and during single test the output is always the same. If we rerun it, we

may get other fixed four-byte data, like 0x00000000, 0xff7ffbe2, 0xff7ffbe3,

0xdfffba5e. We have read the Data Sheet carefully, and it is not clear enough

to us about the description on page 23 for ACK. It said “Due to synchronization

issues, control and status register accesses can incur an additional delay, so

the host software should wait for acknowledgment from the ADV202”, but how? On

the data sheet for ADV212 it is clearer, “Due to synchronization issues,

control and status register accesses may incur an additional delay; therefore,

the host software should wait for acknowledgment from the ADV212 before

attempting another register access.” But what the meaning of “another register

access”? Does it mean that access another register or access the same register

another time? We have configure according to the data sheet. Can you figure the

possible reason for that? Thanks!

 

The information about the device we are using is as followed:

  

ADV202BBCZ

SURF

-150 #08390.4

1012031.1

SINGAPORE

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