Board Controls and Indicators
MSC711x Application Development System (MSC711xADS) Reference Manual, Rev. 1
Freescale Semiconductor
21
2.6.3
GND Bridges
There are seven GND bridges on the MSC711xADS. These bridges assist you in taking general measurements and
establishing logic-analyzer connections.
CAUTION:
Shortening power connection to ground may result in permanent damage to the
MSC711xADS hardware. To prevent this condition, always use insulated ground
clips to connect to a ground bridge.
2.6.4
LED Indicators
Table 2-10 lists the MSC711xADS LED indicators.
Table 2-10. LED Indicators
LED
Indication
Description
LD11
12 V
Green. Indicates whether the +12 V power supply is on.
LD10
5 V
Green. Indicates whether the +5 V power supply is on.
LD29
3.3 V
Green. Indicates whether the +3.3 V power supply is on.
LD9
2.5 V
Green. Indicates whether the +2.5 V power supply is on.
LD13
1.5 V
Green. Indicates whether the +1.5 V power supply is on.
LD12
1.2 V
Green. Presence of the +1.2 V power supply is on.
LD18
RUN
Green. The MPC8272 is performing cycles on the PowerPC bus. When this LED
is dark, the MPC8272 is either running internally or stuck.
LD19
MPC8272 fast Ethernet
port enabled
Yellow. The fast Ethernet port PHY, the DM9161, is connected to FCC2. When
this LED is not lit, the DM9161 is in power-down mode and is disconnected from
FCC2. BCSR0 (see Chapter 4, Memory Map/Programming Model, on page 29)
controls the state of LD19.
LD1
MSC711x fast Ethernet
port enabled
Yellow. The fast Ethernet port PHY, the DM9161, is connected to the MSC711x.
When this LED is not lit, the DM9161 is in power-down mode and is disconnected
from the MSC711x, enabling the use of its associated MII pins for other functions.
BCSR2 (see Chapter 4, Memory Map/Programming Model, on page 29)
controls the state of LD1.
LD2
MPC8272 RS-232 port
ON
Yellow. The RS-232 transceiver connected to P16 is active and communicating.
When this LED is not lit, the transceiver is in shut-down mode.
LD3
MSC711x RS232 Port
ON
Yellow. The RS-232 transceiver connected to P7 is active and communicating.
When this LED is not lit, the transceiver is in shut-down mode.
LD28
MPC8272 fast Ethernet
port full duplex
Red. Indicates whether the DM9161 on the MPC8272 processor is enabled and
is operating in full-duplex mode.
LD27
MPC8272 fast Ethernet
port 100Base-Tx
Green. Indicates whether the DM9161 on the MPC8272 processor is enabled
and is operating in 100 Mbps mode.
LD14
MSC711x fast Ethernet
port full duplex
Red. Indicates whether the DM9161 on the MSC711x processor is enabled and
is operating in Full Duplex operation mode.
LD15
MSC711x fast Ethernet
port 100Base-Tx
Green. Indicates whether the DM9161 on the MSC711x processor is enabled
and is operating in 100 Mbps mode.
LD4
General-purpose LED 2
Red. A general-purpose LED that the user controls via BCSR0.
LD5
General-purpose LED 1
Green. A general-purpose LED that the user controls via BCSR0.