Motorola MSC8101 ADS User Manual download pdf (Page 32)

32 MSC8101ADS RevB User’s Manual MOTOROLA

Operating Instructions

FIGURE 4-8 JP9 - 5V CODEC Source Selection

4•3•8 JS1-5 - Current Consumption Measurement

JS1-5 reside on I/O-pins, core & PLL main flow. To measure current consumption, the correspond-

ing JS should be removed using a solder tool and a current meter (shunt) should be connected

instead, with as shorted and thicker wires as possible.

Warning

The job of removing JS1-5 and soldering current

meter connections instead is very delicate and

should be done by a skilled technician.

If this process is done by unskilled hand or re-

peated more than 3 times, permanent damage

might be inflicted to the MSC8101ADS.

4•3•9 JG1-6 GND Bridges

There are 6 GND bridges on the MSC8101-ADS, 4, designated as GND reside on digital ground

and 2, designated as AGND3 and AGND4 resides on analog ground plane. They are meant to

assist general measurements and logic-analyzer connection.

Warning

When connecting to a GND bridge, use only IN-

SULATED GND clips. Otherwise, un-insulated

clips may cause short- circuits, touching "HOT"

points around them. Failure in doing so, might

result in permanent damage to the

MSC8101ADS.

4•3•10 Solder Bridges

All the solder bridges should be shorted while additional SDRAM device has been assembled on

the ADS board (special requirement).

4•4 LEDs

The MSC8101-ADS has the following indicators:

4•4•1 Fast Ethernet Indicator - LD1

When the LXT970 is enabled and is in 100 Mbps operation mode, the yellow LED - LD1 lights.

4•4•2 Fast Ethernet RX Indicator - LD2

The green Ethernet Receive LED indicator blinks whenever the LXT970 is receiving data from one

of the 10/100-Base-T port.

4•4•3 Ethernet TX Indicator - LD3

JP9 JP9

5V Internal

+5V

Factory Set

External

GND

Frees

cale Semiconductor,

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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