Renesas R-IN32M3 Series User Manual page 182

R-IN32M3-EC User's Manual
7.4.16 Register 23 - BER Counter Register
Register 23 sets the BER counter function of Ethernet PHY and shows the BER results.
15 14 13
BER_CNT_TRIG
MR23
R RW RW
Bit Bit Name
Position
15 BER_LNK_OK
14 BER_CNT_LNK_EN
13 to 11 BER_CNT_TRIG
10 to 7 BER_WINDOW
6 to 0 BER_COUNT
R18UZ0003EJ0501
Jan. 12, 2021
12 11 10 9 8
BER_WINDOW
RW RW RW RW RW
Shows the quality status of the link. It turns to 1 if the value of BER counter is
below the threshold after startup. It is used to detect the reliable links after
startup.
0: Not linked or the state of the link is not good.
1: The state of the link is good.
Operation when the count value of BER and FEQ monitor exceeds the
threshold
0: Only BER_LNK_OK becomes 0 without bringing down the link.
1: Bring down the link.
These bits set the condition to determine the link down or interrupt occurrence
by the value of BER counter.
0: 1 or more
1: More than 1 (2 or more)
2: More than 2 (3 or more)
3: More than 4 (5 or more)
4: More than 8 (9 or more)
5: More than 16 (17 or more)
6: More than 32 (33 or more)
7: More than 64 (65 or more)
These bits set the width of the window of BER counter.
1: 0.2 ms
2: 0.4 ms
3: 0.8 ms
...
15: 3.2 sec
Count value of bit errors in the window time before current.
7 6 5 4 3
BER_COUNT
RW R R R R
Description
7. Ethernet PHY Function
2 1 0
Register Address
17H
Initial Value
5080H
R R R
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