參數(shù)資料
型號(hào)： GT-48001A
廠商： Galileo Technology Services, LLC
英文描述： Switched Ethernet Controller For 10BaseX(10BaseX交換式快速以太網(wǎng)控制器)
中文描述： 交換式以太網(wǎng)控制器10BaseX（10BaseX交換式快速以太網(wǎng)控制器）
文件頁(yè)數(shù)： 63/101頁(yè)
文件大小： 1235K
代理商： GT-48001A
GT-48001A Switched Ethernet Controller
64
Revision 1.6
LEDData: The internal signals are multiplexed on the LEDData output for every data frame. LEDStb activation
signals the presence of data bit #1 (out of 128 bits) on the LEDData output. LEDData transitions occur 200 ns
after LEDClk rising edge. All internal signals accessible via LEDData are active HIGH internally and are
inverted on the LEDData output (i.e. when an internal signal is active, the data bit on the LEDData output will
be LOW). For example: If port#0 transmits data, the internal_event_transmit[0] signal is active HIGH and the
corresponding bit #9 in the LEDData serial stream is LOW.
The timings for the LED serial interface are shown in Figure 16, below.
Figure 16: LED Serial Interface Timings
16.3
Detailed LED Signal Description
16.3.1
Primary Port Status LED
Port Status LED indicates the port status in two operation modes selectable via the LEDMode input pin.
When a port is disabled (via the Port Control Register Port Enable bit or via the EnDev* input), the link detection circuits
are stopped. This means that the link test LED and the internal indications of the link (such as those in the status regis-
ter) Once the port is enabled, the link detection circuits are enabled. In the case of no link pulses, the link test fail indi-
cation will be indicated after the timeout period of 150ms. This means that the earliest time any valid link indication (via
registers or LED interface) is at least 150ms.
16.3.1.1 Primary Port Status LED (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)
16.3.1.2
Status LED blink timing (Mode 0)
Link Integrity test failed - Status LED blinks once every 5 seconds. Primary status bit is active for 420 ms every 5 seconds
LEDClk
1us
200ns
LEDStb
LEDData
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