參數(shù)資料
型號(hào)： GT-48004A
廠商： Galileo Technology Services, LLC
英文描述： Four Port Switched Fast Ethernet Controller(四端口、交換式快速以太網(wǎng)控制器)
中文描述： 四端口交換式快速以太網(wǎng)控制器（四端口，交換式快速以太網(wǎng)控制器）
文件頁(yè)數(shù)： 83/106頁(yè)
文件大小： 953K
代理商： GT-48004A
GT-48004A Four Port Switched Fast Ethernet Controller
N:\Marketing\Docs\Archive\48004A\DATASHEET\Rev 1.0\484ads10.fm
Revision 1.0
78
23.2
Internal Control Registers
Global Control, Offset: 0x140 028
Bi ts
Fi e l d Na m e
Fun cti o n
In iti a l Va l u e
0
DisLearnPro
Disable Learning Process.
0 - Learning process is enabled
1 - Learning process is disabled. The GT-48004A will
not learn any new addresses from the Ethernet ports
0x0
1
RMONEn
RMON Enable.
0 - RMON disabled
1 - The GT-48004A enters the RMON mode (Station-
to-Station connectivity matrix) and asserts the
ChipSel* pin when it reads the packet’s Byte Count
and Source and Destination Addresses from the
DRAM
0x0
2
DevTabMod
Device Table Mode.
0 - The GT-48004A updates the appropriate bits in the
table upon master abort
1 - The CPU updates the Device Table
0x0
3
-
Reserved.
0x1
4
DRAMArbPri
DRAM Arbiter Priority.
This bit indicates the DRAM arbitration scheme of the
four GT-48004A internal units as follows:
0 - 1) Frame Control unit, 2) Switching Core unit, 3)
PCI and InterPCI Control units in round robin scheme.
1- 1) Frame Control unit, 2) Switching Core unit, 3)
InterPCI Control unit, 4) PCI Control unit
0x0
5
DescArbPri
Descriptor Control Arbiter Priority.
This bit indicates the descriptor control arbitration
scheme as follows:
0 -Round robin between the PCI side and the 2 Ether-
net ports. The 2 ports have equal priority.
1- PCI has higher priority than the 2 ports. The priority
is: PCI, Port 0; PCI, Port 1, PCI, Port 0; PCI, Port 1...
0x1
6
ForwUnk
Forward Unknown Packets.
It defines whether the GT-48004A will forward
Unknown packets to the CPU or not.
0 - Do not forward
1 - Forward
0x0
7
ForwNewAdd
Forward New Address.
It defines whether the GT-48004A will forward new
address messages to the CPU or not.
0 - Do not forward
1 - Forward
0x0
8
RecEn
Recovery Enable.
It defines whether the recovery process is enabled or
not.
0 - Disabled
1 - Enabled
0x1
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