DP83822H: Bit error counting

Hiroyasu Koike

Part Number: DP83822H

What I want to do is counting up total error frames (CRC, fragment, undersize, etc).
I thought the following registers have something to do with the implementation.
Table 8-101. 0x04A1 Receive Status Register (RXFS) : bit6
Table 8-34. 0x0015 Receive Error Count Register (RECR)

My DP83822 setting is like below.
100base-tx
rgmii

Could you give me advice? (if it's correct or not)

3 months ago

0 J 3 months ago

TI__Mastermind 26771 points

Hi Koike-san,

Unfortunately, DP838222 only has error counters for symbol errors (register 15h). For other errors, you will have to utilize MAC’s error counters.

Best,

0 Hiroyasu Koike 3 months ago in reply to J

Prodigy 60 points

Hi J,

Thank you for replying. Let me confirm.

DP83822 cannot count up CRC errors.

DP83822 can detect at least one bad CRC frame received by using 0x04A1:6 register.

Am I correct?

+1 J 3 months ago in reply to Hiroyasu Koike

TI__Mastermind 26771 points

Hi Koike-san,

DP83822 cannot count up CRC errors.
I just checked on the EVM if the bit you mentioned goes high. However, I do not see the bit going high when packets with CRC error is sent.
So, DP83822 cannot detect CRC errors coming in from the RJ45 side.

Best,
J

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DP83822H: Bit error counting