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| 型號： | 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） |
| 文件頁數(shù)： | 72/106頁 |
| 文件大小： | 953K |
| 代理商： | GT-48004A |
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GT-48004A Four Port Switched Fast Ethernet Controller
N:\Marketing\Docs\Archive\48004A\DATASHEET\Rev 1.0\484ads10.fm
Revision 1.0
68
18.
LED Support
The serial LED interface is similar to the 3-pin LED interface of the GT-48001A device which requires a PAL to interpret
the LED bit stream. Galileo also provides reference designs and example PAL equations in the LED interface applica-
tion note available on our website.
NOTE: The GT-48004A does not implement the parallel LED interface found on the GT-48002A.
18.1
LED Indications Interface Description
Table 32 shows the data accessible on the LED Indications Serial Interface for each of the GT-48004A ports.
18.2
Detailed LED Signal Description
18.2.1 Primary Port Status LED
The Primary Port Status LED indicates the port status in two operation modes, selectable via the LEDMode input.
18.2.1.1 Primary Port Status LED in Mode 0: (LEDMode input is LOW)
In this mode, the Port Status LED provides the following information:
if Port is disabled
Port Status LED is OFF;
else if Link Integrity test failed
Port Status LED blinks once;
else if Partition State detected
Port Status LED blinks twice;
else Everything is OK (Port Status LED is ON)
18.2.1.2 Status LED blink timing (Mode 0)
Link Integrity test failed, Status LED blinks once. Primary status bit is active for 500 ms every 5s.
Table 32: LED Signals Available
D a ta D escr ipt i o n
Sy mbol ic Sig n al N a me
Ty p e
Primary Port Status LED
primary_port_status
n/a
Transmit data in progress
transmit
dynamic
Receive data in progress
receive
dynamic
Collision active
collision
dynamic
Forwarding of unknown packets
enabled
unknown_enable
static
The port is configured as Sniffer
port_is_sniffer
static
Full/Half duplex
full_duplex
static
Receive Buffer Full
rx_buffer_full
dynamic
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