DS33R41 Maxim Integrated Products, DS33R41 Datasheet - Page 174

• Manufacturer Part Number: DS33R41
• Description: Network Controller & Processor ICs Inverse-Multiplexing Ethernet Mapper wit
• Manufacturer: Maxim Integrated Products

Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 7 to 0: Receiver Maximum Frame (RMPS[7:0]). Eight bits of a 16-bit value. Register description below.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 7 to 0: Receiver Maximum Frame (RMPS[15:8]). 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:
Register Description:
Register Address:
Bit #
Name
Default
Bits 7 to 0: Receive Queue Low Threshold (RQLT[7:0]). 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 x 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:
Register Description:
Register Address:
Bit #
Name
Default
Bits 7 to 0: Receive Queue High Threshold (RQTH[7:0]). 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 x 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.
RMPS15
RMPS7
RQHT7
RQLT7
7
1
7
0
7
0
7
0
RMPS14
RMPS6
RQHT6
RQLT6
6
1
6
0
6
0
6
0
SU.RMFSRL
Receiver Maximum Frame Low Register
158h
SU.RMFSRH
Receiver Maximum Frame High Register
159h
SU.RQLT
Receive Queue Low Threshold (Watermark)
15Ah
SU.RQHT
Receive Queue High Threshold (Watermark)
15Bh
RMPS13
RQHT5
RMPS5
RQLT5
5
0
5
0
5
1
5
0
RMPS12
RQHT4
RMPS4
RQLT4
174 of 335
4
0
4
0
0
0
4
4
RMPS11
RMPS3
RQHT3
RQLT3
3
0
3
0
3
0
3
0
RMPS10
RMPS2
RQHT2
RQLT2
2
0
2
1
2
0
2
0
RQHT1
RQLT1
RMPS1
RMPS9
1
0
1
0
1
0
1
1
RQHT0
RMPS0
RMPS8
RQLT0
0
0
0
0
0
0
0
1