参数资料
型号: GT-48002A
厂商: Galileo Technology Services, LLC
英文描述: Switched Fast Ethernet Controller for 100BaseX(100BaseX交换式快速以太网控制器)
中文描述: 交换式快速以太网控制器(100BaseX交换式快速以太网控制器的100BaseX)
文件页数: 39/102页
文件大小: 1001K
代理商: GT-48002A
Switched Fast Ethernet Controller
Revision 1.2
41
10.3.5 START_OF_PACKET Message (GalNet to CPU)
A message from a target GalNet device to the CPU which contains the target Buffer address.
Table 15: START_OF_PACKET Message (GalNet to CPU)
The START_OF_PACKET message must be transferred in a burst of two words over the PCI.
10.3.6 START_OF_PACKET Message (CPU to GalNet)
A message from the target CPU to the source GalNet device which contains the Empty Buffer address. This message
will only be sent when the GalNet devices needs to forward a unicast packet to the CPU via Intervention mode.
Table 16: START_OF_PACKET Message (CPU to GalNet)
The START_OF_PACKET message must be transferred in a burst of two words over the PCI.
PCI Bi ts
D escr ipt i o n
Address
[31:8]
[7:3]
[2:0]
START_OF_PACKET Base Address (0x140038)
Offset Counter (32 total entries)
‘000’
Data 0
[31]
[30]
[29:22]
[21]
[20:10]
[9:0]
Sniffer (0 - Sniffer type message)
‘0’
Target Port Number (1bit per each port; bit 22 - Port 0, bit 23 - Port 1 etc.)
Multicast/Unicast (0-Unicast)
Byte Count
Target Buffer Address (divided by 0x600)
Data 1
[31:0]
‘0’
PCI Bi ts
D escr ipt i o n
Address
[31:27]
[26:22]
[21]
[20:18]
[17:0]
GalNet Protocol Region
Source Device Number
‘0’ (Internal registers)
‘110’ (START_OF_PACKET message)
‘0’
Data 0
[31]
[30]
[29:22]
[21]
[20:10]
[9:0]
Sniffer (0 - Sniffer type message)
‘0’
Reserved
Multicast/Unicast (0-Unicast)
Byte Count
Target Buffer Address (divided by 0x600)
Data 1
[31:18]
[17:15]
[14:5]
[4:0]
‘0’
Source Port Number
Source Buffer Address (divided by 0x600)
Target CPU Device Number (bits [12:8] in 0x1400 30)
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