Instruction Manual
DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver
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Register Name:
SU.RMFSRL
Register Description:
Receiver Maximum Frame Low Register
Register Address:
158h
Bit # 7 6 5 4 3 2 1 0
Name RMPS7 RMPS6 RMPS5 RMPS4 RMPS3 RMPS2 RMPS1 RMPS0
Default 1 1 1 0 0 0 0 0
Bits 7- 0: Receiver Maximum Frame (RMPS[0:7]) Eight bits of sixteen bit value. Register description below.
Register Name:
SU.RMFSRH
Register Description:
Receiver Maximum Frame High Register
Register Address:
159h
Bit # 7 6 5 4 3 2 1 0
Name RMPS15 RMPS14 RMPS13 RMPS12 RMPS11 RMPS10 RMPS9 RMPS8
Default 0 0 0 0 0 1 1 1
Bits 7- 0: Receiver Maximum Frame (RMPS[8:15]) This value is the receiver’s maximum frame size (in bytes),
up to a maximum of 2016 bytes. Any frame received greater than this value is rejected. The frame size includes
destination address, source address, type/length, data and crc-32. The frame size is not the same as the frame
length encoded within the IEEE 802.3 frame. Any values programmed that are greater than 2016 will have
unpredictable behavior and should be avoided.
Register Name:
SU.RQLT
Register Description:
Receive Queue Low Threshold (Watermark)
Register Address:
15Ah
Bit # 7 6 5 4 3 2 1 0
Name RQLT7 RQLT6 RQLT5 RQLT4 RQLT3 RQLT2 RQLT1 RQLT0
Default 0 0 0 0 0 0 0 0
Bits 0 - 7: Receive Queue Low Threshold (RQLT[0:7]) The receive queue low threshold for the connection, in
increments of 32 packets of 2048 bytes each. The value of this register is multiplied by 32 * 2048 bytes to
determine the byte location of the threshold. Note that the receive queue is for data that was received from the
Ethernet Interface to be sent to the Serial Interface.
Register Name:
SU.RQHT
Register Description:
Receive Queue High Threshold (Watermark)
Register Address:
15Bh
Bit # 7 6 5 4 3 2 1 0
Name RQHT7 RQHT6 RQHT5 RQHT4 RQHT3 RQHT2 RQHT1 RQHT0
Default 0 0 0 0 0 0 0 0
Bits 0 – 7: Receive Queue High Threshold (RQTH[0:7]) The receive queue high threshold for the connection, in
increments of 32 packets of 2048 bytes each. The value of this register is multiplied by 32 * 2048 bytes to
determine the byte location of the threshold. Note that the receive queue is for data that was received from the
Ethernet Interface to be sent to the Serial Interface.