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CHAPTER 5 ETHERNET CONTROLLER
362
Preliminary User’s Manual S14767EJ1V0UM00
5.2.5.9 En_RXSR-Receive Status Register (224H R)
Bit
Field
Functions
Default
31
RLENE
A packet which was less than 64 octets or larger than 1518 octets was received.(If a VLAN
packet, the packet was less than 68 bytes or larger than 1522 bytes)
0
30
VLAN
A packet in which the Ethernet-encoded TPID field matched the value of the En_VLTP
register was received.
Note1
0
29
USOP
A control frame containing an unknown OP code was received.
Note 2
0
28
PRCF
A control frame containing the PAUSE OP code was received.
Note 2
0
27
RCFR
A frame containing a valid type field designating it as a control frame was received.
Note 2
0
26
DBNB
An alignment error occurred.
0
25
RBRO
A broadcast packet was received.
0
24
RMUL
A multicast packet was received.
0
23
RXOK
A packet which had a valid CRC and no RXER was received.
Note 1
0
22
RLOR
The value of the length field in the received packet was over 1518 bytes.
Note 3
0
21
RLER
The value of the length field in the received packet didn’t match the actual data byte length.
Note 3, Note 4
0
20
RCRCE
A CRC error occurred.
0
19
RCV
RXER was detected.
0
18
CEPS
A False Carrier was detected.
0
17
REPS
A packet which had a preamble and SFD only or one data nibble only was received.
0
16
PAIG
The previous packet with the following status was received and
The carrier length was 6072 nibble (3036 octets)
Short IPG
When En_MACC1 register: PUREP bit was set to 1, an invalid preamble
or invalid SFD was detected.
0
15:0
RBYT
The received byte count
0
Note
1.
2.
3.
4.
This status is not reported when a CRC error or RXER occurs.
This status is not reported when a CRC error occurs.
This status is not reported if En_MACC1 register: FLCHT bit is cleared.
When the value of the length field is over 1518 bytes, it is reported only as RLOR status, not as RLER
status.
5.2.5.10 En_RXDPR-Receive Descriptor Pointer (22CH R/W)
Bit
Field
Functions
Default
31:2
RCVDP
Receive Descriptor Pointer:
Please see the Section 5.3.2.1.
0H
1:0
-
Reserved for future use. Write as 0
-