AM79C850KCW AMD [Advanced Micro Devices], AM79C850KCW Datasheet - Page 30

• Manufacturer Part Number: AM79C850KCW
• Description: SUPERNET-R 3
• Manufacturer: AMD [Advanced Micro Devices]

Options for selecting frame types under two receive
queues operation is as follows:
30
MSB
RECVX3:0
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010–1111
AMD
15
14
Receive all frames except the frame type
selected for other queue. RECV1[3:0] bits
cannot be programmed as “0000” when
RECV2[3:0] bits are non-zero.
LLC (includes both Sync. & Async. LLC
frames)
SMT
Non-SMT (includes all non-SMT frames
except MAC & Void, MAC & Void frames
are received if Promiscuous mode is
selected in MDREG1)
Implementor
MAC
Sync. LLC
Async. LLC
Void
Async. LLC & SMT
Reserved
13
12
Frame Type
Figure 3. Frame Selection Register (FRSELREG)
11
10
P R E L I M I N A R Y
9
SUPERNET 3
8
7
The above selection of frames for each queue is made
by programming appropriate bits in the Frame Selection
register (FRSELREG) and is applicable to only those
frames that meet the criteria for copying as defined by
ADDET2–0 bits of Mode Register 1 (MDREG1) of
SUPERNET 3. The following restrictions apply to
frame selection:
1. The same selection is not allowed for both queues.
2. If high level selection option is used for a given frame
Programming the Frame Selection register with the
same selection in both the RECVx3:0 bits would
result in SUPERNET 3 operating as a single receive
queue mode, and would default to Receive Queue 1.
This overrides the MENDRCV bit in the Mode
Register 3 (MDREG3).
type, then sub-level selection for the same frame
type is not allowed [i.e. If LLC (0001) option is
selected for one queue, then Sync. LLC (0110) or
Async. LLC (0111) or Async. LLC & SMT options are
not allowed for the second queue]. If a selection is
made where one frame type is a sub-set of the other
frame type, the selection made for RECV1 queue
supersedes the selection for RECV2 queue.
6
5
4
3
2
1
ENRCVADSWAP
ENXMTADSWAP
0
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RECV1(0)
RECV1(1)
RECV1(2)
RECV1(3)
RECV2(0)
RECV2(1)
RECV2(2)
RECV2(3)
19574A-4
LSB