Maxim Integrated DS33R11 - Manual (Page 162)

DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver
162 of 344
Register Name:
LI.RMPSCL
Register Description: Receive Maximum Packet Size Control Low Register
Register Address: 102h
Bit
# 7 6 5 4 3 2 1 0
Name RMX7 RMX6 RMX5 RMX4 RMX3 RMX2 RMX1 RMX0
Default 1 1 1 0 0 0 0 0
Bits 0 - 7: Receive Maximum Packet Size (RMX[7:0]) Eight bits of a sixteen bit value. Register description below.
Register Name:
LI.RMPSCH
Register Description: Receive Maximum Packet Size Control High Register
Register Address: 103h
Bit
# 7 6 5 4 3 2 1 0
Name RMX15 RMX14 RMX13 RMX12 RMX11 RMX10 RMX9 RMX8
Default
0 0 0 0 0 1 1 1
Bits 0-7: Receive Maximum Packet Size (RMX[8:15]) These sixteen bits indicate the maximum allowable packet
size in bytes. The size includes the FCS bytes, but excludes bit/byte stuffing. Note: If the maximum packet size is
less than the minimum packet size, all packets are discarded. When packet processing is disabled, these sixteen
bits indicate the "packet" size the incoming data is to be broken into.
The maximum packet size allowable is 2016 bytes plus the FCS bytes. Any values programmed that are greater
than 2016 + FCS will have the same effect as 2016+ FCS value.
In X.86 mode, the X.86 encapsulation bytes are included in maximum size control.
Register Name:
LI.RPPSR
Register Description: Receive Packet Processor Status Register
Register Address: 104h
Bit
# 7 6 5 4 3 2 1 0
Name - - - - - REPC RAPC RSPC
Default 0 0 0 0 0 0 0 0
Bit 2: Receive FCS Errored Packet Count (REPC) This read only bit indicates that the receive FCS errored
packet count is nonzero.
Bit 1: Receive Aborted Packet Count (RAPC) This read only bit indicates that the receive aborted packet count
is nonzero.
Bit 0: Receive Size Violation Packet Count (RSPC) This read only bit indicates that the receive size violation
packet count is nonzero.