Clock Source Select Header, W1 - Motorola M68EM05P18 User Manual

HC05EVS Configuration and Operation
Clock Source
Select Header, W1
34
Jumper header W1 determines the clock-signal source. The diagram
here illustrates the jumper header where the pin marked COMMON is
always connected to one of the three clock source pins via the fabricated
jumper. The default configuration, between CAN and COMMON, selects
the 4-MHz canned oscillator clock source (at board location XY1).
Another possible clock source is a user supplied clock source, coming
through the target cable connected to J2. To use this source, reposition
the W1 jumper header between the T_OSC1 and COMMON pins.
NOTE:
The user supplied source through the target cable should be
a CMOS level square wave.
NOTE:
The W1 configuration between MMDS05 and COMMON is
not correct for an M68EM05P18 that is part of an HC05EVS
system.
HC05EVS Configuration and Operation
Setting M68EM05P18 Jumper Headers
CLK SRC
1
CAN
COMMON T_OSC1
FABRICATED
MMDS05
JUMPER
W1
M68EM05P18UM/D
MOTOROLA