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The green Ethernet Receive LED indicator blinks whenever the LXT970 is transmitting data via the
10/100-Base-T port.
4•4•4
Ethernet LINK Indicator - LD4
The yellow Ethernet Twisted Pair Link Integrity LED indicator - LINK, lights to indicate good link
integrity on the 10/100-Base-T port. LD4 is off when the link integrity fails.
4•4•5
Fast Ethernet CLSN Indicator - LD5
The red Ethernet Collision LED indicator CLSN, lights whenever a collision condition is detected
on the 10/100-Base-T port, i.e., simultaneous receive and transmit. This led functions in this duty
provided that bits 7:6) of LXT970's register 19, are cleared.
4•4•6
ATM RX Indicator - LD6
The green ATM Receive LED indicator blinks whenever the PM5350 ATM-UNI is receiving cells
via the ATM port.
4•4•7
ATM TX Indicator - LD7
The green ATM Receive LED indicator blinks whenever the PM5350 ATM-UNI is transmitting cells
via the ATM port.
4•4•8
TEXP Indicator - LD8
The green Timer Expired LED indicates status of Timer 4 output and lights when it's low.
4•4•9
Signaling Indicator 1 - LD9
This red indication LED has no dedicated function over the ADS. It is meant to provide additional
visibility for program behavior. Its different color from LD9 provides additional information. It is con-
trolled by BCSR0/7. When either of HRESET or Power-On-Reset is asserted the LED lights as
well.
4•4•10
Signaling Indicator 0 - LD10
This green indication LED has no dedicated function over the ADS. It is meant to provide some
visibility for program behavior. It is controlled by BCSR0/6. When either of SRESET or Power-On-
Reset is asserted the LED lights as well.
4•4•11
RS232 Port 2 ON - LD11
When the yellow RS232 Port 2 ON LED is lit, it designates that the RS232 transceiver connected
to P27B, is active and communication via that medium is allowed. When darkened, it designates,
that the transceiver is in shutdown mode and its associated SMC1 pins may be used off-board via
the expansion connectors.
4•4•12
RS232 Port 1 ON - LD12
When the yellow RS232 Port 1 ON LED is lit, it designates, that the RS232 transceiver connected
to P27A, is active and communication via that medium is allowed. When darkened, it designates
that the transceiver is in shutdown mode and its associated SCC1 pins may be used off-board via
the expansion connectors.
4•4•13
Fast Ethernet Port Initially Enabled - LD13
When the yellow FETH ON LED is lit, it indicates that the fast ethernet port transceiver - the
LXT970, is initially active. When it is dark, it indicates that the LXT970 is initially in power down
mode, enabling the use of its associated FCC2 pins off-board via the expansion connectors. The
state of LD13 is controlled by bit BCSR1/4.
This is a soft-indication, i.e., since the LXT970 may be controlled via the MII port, it is possible that
the state of LD13 does not reflect correctly the status of the LXT970.
MOTOROLA
Freescale Semiconductor, Inc.
Operating Instructions
MSC8101ADS RevB User's Manual
For More Information On This Product,
Go to: www.freescale.com
33
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