DS33Z41 Maxim Integrated Products, DS33Z41 Datasheet - Page 121

• Manufacturer Part Number: DS33Z41
• Description: Network Controller & Processor ICs Quad Inverse-Multipl exing Ethernet Mappe
• Manufacturer: Maxim Integrated Products

Specifications of DS33Z41

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 7 to 0: Receiver Maximum Frame (RMPS7 to RMPS0). Eight bits of 16-bit value. Register description
below.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 7 to 0: Receiver Maximum Frame (RMPS15 to RMPS8). 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 (RQLT7 to RQLT0). 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:
Register Description:
Register Address:
Bit #
Name
Default
Bits 7 to 0: Receive Queue High Threshold (RQHT7 to RQHT0). 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.
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
121 of 167
RQHT4
RMPS4
RQLT4
4
0
4
0
4
0
4
0
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
RMPS1
RMPS9
RQLT1
1
0
1
0
1
0
1
1
RQHT0
RQLT0
RMPS0
RMPS8
0
0
0
0
0
0
0
1