acd80900 ETC-unknow, acd80900 Datasheet - Page 14

• Manufacturer Part Number: acd80900
• Description: 24 Ports 10/100 Fast Ethernet Switch Controller
• Manufacturer: ETC-unknow

* 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:
Where
The start of each ARL result is indicated by assertion
of ARLDIV signal.
Table-11: LED Interface Signals
LEDVLD0
LEDVLD1
nLEDCLK
nLED0
nLED1
nLED2
nLED3
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
SID is a 5-bit ID of the source port (0 - 23)
RSLT is a 2-bit result, defined as:
DID is a 5-bit ID of the destination port (0 - 23)
Name
SID
00 - reserved
01 - matched
10 - not matched
11 - forced discard
Type
O
O
O
O
O
O
O
LED signal valid #0
LED signal valid #1
2.5 MHz LED clock
Dual purpose indicator
Dual purpose indicator
Dual purpose indicator
Dual purpose indicator
RSLT
Description
DID
1
0
-
address learning status
full duplex indication
port speed (1=10Mbps,0=100Mbps)
Link status
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.
Signal Group 1
0
1
-
frame error indicator
collision indication
receiving activity
transmit activity
Signal Group 2
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