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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： | 6/101页 |
| 文件大小： | 1235K |
| 代理商： | GT-48001A |
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GT-48001A Switched Ethernet Controller
12
Revision 1.6
Scan*
I
Scan: This pin together with TriState* indicate the GT-48001A mode of opera-
tion as follows:
Factory test modes are reserved and are not to be used in-system. Failure to
observe this restriction could result in damage to the device.
TriState*
I
Tri-State: This pin together with Scan* indicate the GT-48001A mode of oper-
ation as described above.
DisWD*
I
Disable Watchdog Timer: Active LOW. DisWD* controls the enabling
(HIGH) or disabling (LOW) of the Tx Watchdog Timer on all ports.
DisBufThr*
I
Buffer Threshold: Active LOW. This pin externally enables or disables the
buffer threshold. When HIGH, the buffers allocated to the ports and the PCI
are limited to the number written in the Rx Buffer Threshold Register. When
LOW, the buffers are dynamically allocated to the ports and the PCI bus (i.e.
there is no limitation on the buffers’ allocation.)
Limit4
I
Backoff Algorithm: This pin selects the number of retransmit attempts after a
collision will occur before the back-off alogorithm is restarted. When LOW, 16
retransmit attempts after a collision must occur before the back-off alogorithm
is restarted (802.3 standard). When HIGH, 4 retransmit attempts after a colli-
sion must occur before the back-off alogorithm is restarted (more aggressive.)
EnElScrub*
Enable Empty List Scrubing: For testing purposes only. Must be pulled
HIGH.
SkipInit*
I
Skip Initialization Stage: Active LOW. This pin controls the initialization
stage of the GT-48001A. When asserted, the GT-48001A skips the initializa-
tion stage (clearing the address table which is stored in the DRAM), upon the
deassertion of Rst*. This pin is typically used for testing and the default state is
to pull this pin HIGH.
S y mbol
Ty p e
D esc ri pti o n
Sc an*
Tr i S ta te *
Mode
1
Normal operation
0
1
Factory test mode (reserved)
1
0
The GT-48001A drives all out-
puts and I/O pins to high imped-
ance.
0
Factory test mode (reserved)
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