DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver

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.

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Maxim DS33R11 specifications Li.Rmpscl, Li.Rmpsch, Li.Rppsr