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AL103 Revision 1.0
9/00
Reference Only / Allayer Communications
41
Table 22: System Configuration Register III (Register 02)
BIT
NAME
DESCRIPTION
15
Reserved
Reserved (Must set to 0).
14
DISPHYReset
PHY Reset Option.
0: Reset PHY on link down.
1: Don’t reset PHY on link down.
13
Skip_Reg6
Enable skip register 6 read during auto-negotiation for Seeq PHY.
0: Don’t skip.
1: Skip
12~11
Reserved
Reserved (Must set to 0).
10
AgeRes
Age Resolution.
0: Normal aging.
1: Slow down aging.
9
BpIPGSelEn
Backpressure IPG Select Enable.
0: Backpressure IPG = 96BT.
1: According to BpIPGSel value.
8
IPG64
IPG Control.
0: IPG = 96BT
1: IPG = 64BT
7~6
Reserved
Reserved
5
SG16M
SGRAM Select.
0: 8 Mbit SGRAM
1: 16 Mbit SGRAM
4
BPCOL
Backpressure Control.
0: Carrier based.
1: Collision based.
3~2
BpIPGSel
Backpressure IPG Select.
00: 48BT; 01: 56BT; 10: 65BT; 11: 72BT.
1
Reserved
Reserved
0
BCdrop_SC
0: Flow control multicast.
1: Flow control multicast/broadcast.
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