MDS212 Datasheet, PDF (69/111 Pages) Zarlink Semiconductor Inc – 12-Port 10/100Mbps Ethernet Switch

MDS212
Data Sheet
Frame Engine and MAC Configuration
Bit [19]
Bit [20]
Bit [21]
Bit [22]
Bit [23]
Bit [24]
Bit [25]
Bit [26]
FE_AGEN
FOF
Dec_Buffer_C NT
BC_EN
STA_EN
SEL_PCS
Link_GT
IPMCIP
Aging enable. If true, the memory resources, occupied by the old
message, will free up.
Default = 1
0 = disable aging
1 = enable aging
Forward Oversize FramesPower-up
default =0
0 = Discard oversize frames
1 = Forward oversize frames
Decrements buffer counter. When the software writes “1” to this bit, the
Frame Engine decreases buffer counter by one.
Buffer counter enable
0 = Disable (no head of line control)
1 = enable
Status counter enable
0 = collect status in counter
disable1 = collect status in counter enable
Default=0
0 = Use external PCS
1 = Use internal PCS in the chip
TX LED will be off when the link is down and this bit is 0
Default =0
0 = Gate 0ff TX_En when Link down
1 = Not Gate off TX_En when Link down
Multicast privileges enable:
IP multicast traffic has a privilege
over regular multicast traffic.
Default=0
0= disable
1= enable
Boot Strap Determine by the bootstrap value.
Bit [27]
Bit [28]
BMOD
RW
Bit [29]
SWM
Control Bus Mode (Read only bit) Must be 0
CPU Read/Write Control Polarity Selection (Read only bit)
0 = R/W#
1 = W/R#
Switching Mode (Read only bit)
Default=1
0 = Managed mode
1 = Unmanaged mode
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Zarlink Semiconductor Inc.