Motorola M68EVB912B32, User Manual

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HARDWARE REFERENCE
68EVB912B32UM/D 4-2
CAUTION
When cutting a PCB trace to customize a header footprint, use a
sharp blade. Be careful to avoid personal injury and not to cut
adjacent traces.
Key to Table 4-1: Headers are depicted as viewed from either the
component side as shown in Figure 1-1 or the
solder side as shown in Figure 1-2.
2-pin header with no jumper installed or
2-pin cut-trace header with trace cut
2-pin header with jumper installed
2-pin cut-trace header with default trace intact
3-pin header with no jumper installed
3-pin header with jumper installed on left 2 pins
1-2 bold pin numbers indicate factory-default settings
1-2, cut italics indicate alternate settings
Table 4-1. Jumper and Header Functions
Diagram Pins Description
W1 RS-232C TXD Connection to SCI PS1
1
2
1-2
cut
TXD enabled
TXD disconnected from SCI port
W2 RS-232C RXD Connection to SCI PS0
1
2
1-2
cut
RXD enabled
RXD disconnected from SCI port