Motorola M68EVB912B32, User Manual

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CONFIGURATION AND SETUP
68EVB912B32UM/D 2-2
Table 2-1. EVB Startup Mode Jumpers
Jumper
Positions
Startup Mode
W3 W4
0 0 EVB execution mode (default). D-Bug12 is executed from Flash EEPROM upon reset.
The D-Bug12 prompt appears immediately on the terminal display.
1 0 JUMP-EEPROM mode. User code is executed from byte-erasable EEPROM upon reset.
For more information, refer to 3.1 Operating Modes.
0 1 Remote Debugging through BDM OUT header (W12)
1 1 BOOTLOAD mode
Other jumper settings affect the hardware setup and/or MCU operational modes. For an
overview of all jumper-selectable functions, refer to 1.2 General Description and Features.
For details of the settings, see Table 4-1.
2.3 EVB TO POWER SUPPLY CONNECTION
The EVB requires a user-provided external power supply. See Table 1-1 for the voltage and
current specifications. For full details of the EVB’s power-input circuitry, refer to 4.3 Power
Input Circuitry.
A power supply with current-limiting capability is desirable. If this feature is available on the
power supply, set it at 200 mA.
Connect the external power supply to connector P5 on the EVB, using 20 AWG or smaller
insulated wire. Strip each wire’s insulation 1/4 in. from the end, lift the P5 contact lever to
release tension on the contact, insert the bare end of the wire into P5, and close the lever to
secure the wire. Observe the polarity carefully.
CAUTION
Do not use wire larger than 20 AWG in connector P5. Larger wire
could damage the connector.
2.4 EVB TO TERMINAL CONNECTION
For factory-default operation, connect the terminal to P1 on the EVB, as shown in Table 2-2.
This setup uses the MCU’s SCI port and its associated RS-232C interface for communications
with the terminal device.