参数资料
型号: GT-48208
厂商: Galileo Technology Services, LLC
英文描述: Advanced Switched Ethernet Controllers for 10+10/100 BaseX(高级交换式 10+10/100 BaseX以太网控制器)
中文描述: 先进的交换式以太网控制器的10 10/100 BaseX(高级交换式10 10/100 BaseX以太网控制器)
文件页数: 124/135页
文件大小: 1619K
代理商: GT-48208
GT-482xx Switched Ethernet Controllers for 10+10/100 BaseX
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Revision 1.2
89
6:2
JAM_IPG
5 bits to determine the JAM_IPG. The step is 10nSec (1
bit time). The JAM_IPG vary between 1 bit time to 32.
01000b (8 bit
time)
11:7
IPG_JAM_TO_DATA
5 bits to determine the IPG JAM to DATA. The step is
10nSec (1 bit time). The JAM_IPG vary between 1 bit
time to 32.
10000b (16 bit
time)
16:12
IPGData
Inter-Packet Gap (IPG): The IPG varies between 12 bit-
times (0x3) and 124 bit-times (0x1F). The step is
40ns@100mbs or 400 ns@10mbs (4 bit-times). The
default value is 18 hex, or 0.96us@100mbs
(9.6uS@10mbs).
Value should be written in hexadecimal format.
Note: These bits may be changed only when PortEn bits
are set to 0 in all Port Control registers (Port is disabled).
0x18 = 24 deci-
mal
21:17
DataBlind
Data Blinder:
The number of nibbles from the beginning of the IFG, in
which the GT-482xx will restart the IFG counter when
detecting a carrier activity. Following this value, the GT-
482xx will enter the Data Blinder zone and will not reset
the IFG counter to ensure fair access to the medium.
Value should be written in hexadecimal format.
The default is 10 hex (64 bit times - 2/3 of the default
IFG). The step is 40ns (4 bit-times). Valid range is 3 to
1F hex nibbles.
Note: These bits may be changed only when PortEn bits
are set to 0 in all Port Control registers (Port is disabled).
0x10 = 16 deci-
mal
25:22
Reserved
0x0
Table 28: Watchdog and Tx Threshold Register, Offset: 0x14
B it s
Field N a m e
Funct ion
Init ia l Va lue
3:0
TxWatTim
Tx Watchdog Timer.
For 100 Mbps operation, the default value of the timer is
63msec and the range is between 10.5mSec and
168msec, in 10.5 ms steps. For 10 Mbps operation, the
default value of the timer is 630msec and the range is
between 105ms to 1680ms, in 105 ms steps. Valid val-
ues: 1 to F hex.
Value should be written in hexadecimal format.
0x6 (63 ms @
100Mbps; 630 ms
@ 10 Mbps)
8:4
ChainNu
Chain Number. These bits specify the number of entries
in a chain in the Address Table
0x08 (16 entries)
Table 27: Serial Parameters 100 Register, Offset: 0x78 (Continued)
B it s
Field N a m e
Funct ion
Init ial Va lu e
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