参数资料
型号: GT-48001A
厂商: Galileo Technology Services, LLC
英文描述: Switched Ethernet Controller For 10BaseX(10BaseX交换式快速以太网控制器)
中文描述: 交换式以太网控制器10BaseX(10BaseX交换式快速以太网控制器)
文件页数: 82/101页
文件大小: 1235K
代理商: GT-48001A
GT-48001A Switched Ethernet Controller
Revision 1.6
81
CPU Buffe r Ba s e Address, Offset: 0x14003 4
Note: When reading the CPU Buffer Base Address Register (0x140034), the address will be read out 1 bit shifted left.
CPU START_OF_PACKET Base Address, Offset: 0x140038
CPU NEW_ADDRESS Base Address, Offset: 0x14003c
12:9
RxBufThr
Receive Buffer Threshold.
These bits determine the threshold of the receive buff-
ers. Meaningful only when the BufThrEn bit in the Glo-
bal Control register is set. The step is 10. The
number of buffers is programmed value * 10 + 9. The
value varies between 9 (0x0) and 159 (0xf). The
default is 29 (0x2) for 1MB DRAM and 79 (0x7) for
2MB DRAM.
GT-48001A
0x2 (29) w/ 1M DRAM
0x7 (79) w/ 2M DRAM
GT-48001
0x3 (39) w/ 1M DRAM
0x7 (79) w/ 2M DRAM
18:13
-
Reserved. During writes to this register, bits 18:13
must be written to their default values.
0x1 (1MB DRAM)
0x13 (2MB DRAM)
Bi ts
Fi e l d Na m e
Fun cti o n
In iti a l Va l u e
31:15
BaseAdd
Contains a pointer to the CPU buffer area
0x0
14:0
Reserve
Reserved. Must be 0x0 when written.
-
Bi ts
Fi e l d Na m e
Fun cti o n
In iti a l Va l u e
31:8
StBaseAdd
Contains a pointer to the CPU START_OF_PACKET
area.
The area includes 32 entries (2 32-bit words each) for
the GT-48001A’s START_OF_PACKET messages.
0x0
7:0
Reserve
Reserved. Must be 0x0 when written.
-
Bi ts
Fi e l d Na m e
Fun cti o n
In iti a l Va l u e
31:8
NABaseAdd
Contains a pointer to the CPU NEW_ADDRESS area.
The area includes 32 entries (2 32-bit words each) for
the GT-48001A’s NEW_ADDRESS messages.
0x0
7:0
Reserve
Reserved. Must be 0x0 when written.
-
Bi ts
Fi e l d Na m e
Fun cti o n
In iti a l Va l u e
相关PDF资料
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