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2.2.2 IRQ_SW1 and IRQ_SW2 Push Switches

Push switches SW1 and SW2 provide an active low signal when depressed to MCF56F8006

ports PB2 and PB3 respectively. See options JP1 and JP2 to change the input ports applied.

2.2.3 Y2 Crystal Reference

Y2 provides a location for an external 32 kHz can crystal to be applied to the MC56F8006. Refer

to the device user manual for crystal application information. Components R47, R48, C40 and

C41 must also be applied with the crystal. Refer to the MC56F8006DEMO schematic diagram for

component connection details.

2.3 Ports and Connectors

2.3.1 J4: USB port

J4 will provide a single connection to power the MC56F8006DEMO board. Supporting host

software for basic operation is provided on the support DVD. The current release will provide a

virtual serial terminal port.

2.3.1.1 STATUS and TPWR Indicators

These indicators provide USB operation status indication. Status will flash or blink to indicate

operation. TPWR will be on when target power is enabled from the USB port.

2.3.2 PWR Jack

This connector provides external power input to the board. The PWR jack accepts a standard

2.0 ~ 2.1 mm center barrel plug connector (positive voltage center) to apply a +VIN supply of +5

VDC to +12V. Also review option jumper JP3 and JP4 operation for power application. External

power is not required when applying the USB development port, J4.2.3.2.1 POWER Indicator The

POWER indicator will be on when the MC56F8006DEMO board has +3.3V available for operation.

2.3.3 +3.3 V and GND Test Points

Test point pads are provided for access to VSS/Ground and the +3.3V power signal on the board.

2.3.4 COM Port

The COM port connector and supporting interface circuit is not populated by default. The USB

development port J4 may provide serial port connection to the MC56F8006 SCI if wanted. Refer

to the TX_EN and RX_EN option jumpers and the J4 USB BDM connection for more details.

Components required to apply the COM port are following:

• U2: MAX3232CPWR, TI or same, note

• COM: Generic 9 pin D-Sub connector, R/A female or socket type, .318 mount hole to PCB

pin distance

• C7, C8, C9, C10 and C11: SMT 0805 0.1 μF X7R 50V capacitors