Renesas R-IN32M3 Series User Manual page 190

R-IN32M3-EC User's Manual
7.4.24 Register 31 - PHY Special Control/Status Register
Register 31 does the configuration and status of the special features of Ethernet PHY.
15 14 13
MR31
(RESERVED)
RW RW RW
Bit Position Bit Name
15 to 13 (RESERVED)
12 AUTODONE
11 to 7 (RESERVED)
6 ENABLE_4B5B
5 (RESERVED)
4 to 2 SPEED_
INDICATION
1 RX_DV_J2T
0 SCRAMBLE_
DISABLE
R18UZ0003EJ0501
Jan. 12, 2021
12 11 10 9 8
(RESERVED)
R RW RW RW RW
Reserved (Write 0 and ignore reading)
Completion notice of auto negotiation
0: Incomplete or auto negotiation not set
1: Completion
Reserved (Write 0 and ignore reading)
Enables/disables settings in 4B/5B encoding/decoding
0: Invalid (Bypass 4B/5B encoding/decoding)
1: Valid
Reserved (Write 0 and ignore reading)
These bits show the speed
001: 10 Mbps half-duplex
101: 10 Mbps duplex
010: 100 Mbps half-duplex
110: 100 Mbps duplex
Sets the delimiter to identify the beginning and the end of the frame.
0: RX_DV rises by JK delimiter and falls down by TR delimiter.
1: RX_DV rises by J delimiter and falls down by T delimiter.
Valid/Invalid settings of data scrambling
0: Valid
1: Invalid
7 6 5 4 3
SPEED_
INDICATION
RW RW RW R R
Description
7. Ethernet PHY Function
2 1 0
Register Address
1FH
Initial Value
0040H
R RW RW
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