Clock Source Select Header (P6) - Motorola HC05F6 User Manual

2
2.1.2
MOTOROLA
2-2
The P4 pins 2 and 3 configuration is not correct for an
F6EM that is part of an MMDS05 system. Such a config-
uration would interfere with correct operation of the
RESETIN and RESETOUT commands.

Clock Source Select Header (P6)

Jumper header P6 determines the source of the clock signal. The dia-
gram below shows the factory configuration: the fabricated jumper
between pins 2 and 3 selects the F6EM canned oscillator clock source.
FABRICATED
JUMPER
Alternatively, you may use a clock source originating from the control
board. To do so, reposition the P6 jumper between pins 1 and 2, then use
the MMDS05 OSC command to select a frequency.
NOTE
P6
1
MMDS05
2
XTAL
3
HC05F6EM USER'S MANUAL