ACD82124 Datasheet, PDF (14/48 Pages) List of Unclassifed Manufacturers – 24 Ports 10/100 Fast Ethernet Switch Controller

Table-11: LED Interface Signals
Name
Type
Description
LEDVLD0 O LED signal valid #0
LEDVLD1 O LED signal valid #1
nLEDCLK O 2.5 MHz LED clock
nLED0
O Dual purpose indicator
nLED1
O Dual purpose indicator
nLED2
O Dual purpose indicator
nLED3
O Dual purpose indicator
Signal Group 1
1
0
-
address learning status
full duplex indication
port speed (1=10Mbps,0=100Mbps)
Link status
Signal Group 2
0
1
-
frame error indicator
collision indication
receiving activity
transmit activity
• 1001 - Flow Control/Multiple Collision*
• 1010 - Short Event/Excessive Collision*
• 1011 - Runt/Late Collision*
• 1100 - Symbol Error
• 1101 - FCS Error
• 1110 - Long Event
• 1111 - Reserved
*Note: _{error type depends on whether the port is re-}
ceiving or transmitting.
ARLDIx is used to receive the lookup result from the
external ARL. Result is returned by external ARL de-
vice through the ARLDIx lines. Returned data is sampled
by the rising edge of ARLCLK. The ARL result has the
following format:
LED Interface
The signals in the LED interface is described in table-
6.10:
The status of each port is displayed on the LED inter-
face for every 50ms. LEDVLD0 and LEDVLD1 are
used to indicate the start and end of the LED data.
LED data is clocked out by the falling edge of LEDCLK,
and should be sampled by the rising edge of LEDCLK.
LED data of port 23 are clocked out first, followed by
port 22 down to port 0. All LED signals are low active.
SID
RSLT
DID
Where
• SID is a 5-bit ID of the source port (0 - 23)
• RSLT is a 2-bit result, defined as:
00 - reserved
01 - matched
10 - not matched
11 - forced discard
• DID is a 5-bit ID of the destination port (0 - 23)
The start of each ARL result is indicated by assertion
of ARLDIV signal.
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