Motorola M68CPU32BUG Manuel d'utilisateur télécharger pdf (Page 19)

HARDWARE PREPARATION AND INSTALLATION

M68332BCC/D 2-9 MOTOROLA

REV 1

2.3.5 RxD Select Header (J5)

Jumper header allows the user to disconnect the receive RxD serial data pin of the MC68332

MCU device (U5) from the RS-232C receiver/driver (U6) and use a target system

receiver/driver. The BCC is shipped from the factory with receiver/driver connected to MCU

RxD via a cut-trace short on the bottom of the BCC PCB between J5, pins 1 and 2 (shown

below). A fabricated jumper is also installed on pins 1 and 2. To disconnect the RxD pin of the

MCU, cut this trace and remove the jumper.

RxD

DO1 RX1

RxD

MC68332 MCU

MC145407

64-Pin Expansion Connector

RCV 232

Fabricated Jumper

NOTE

If the cut-trace short on jumper header J5 is cut, the fabricated jumper must be

reinstalled on J5 to return the BCC to its default setting.

Refer to the BCC schematic diagram for more detail on RxD signal wiring.

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Motorola M68CPU32BUG Manuel d'utilisateur Page 19