HARDWARE PREPARATION AND INSTALLATION
M68MPB16R3UM/D
2-9
2.2.6
Using a 32 KHz Clock
The factory installed crystal oscillator in location Y1 is rated at 4.194 megahertz.
You may change Y1 to change the clock speed of the MPB. The only other
oscillator you may install is 32 kilohertz. If you change Y1 to the slower value (32
KHz) you must replace the following capacitors and resistor (see diagram below):
C5
–
1 µf
C57 –
1 µf
R1
–
18 k
Ω
MC68HC916R3
L4
L5
W5
C8
R1
C5
C6
VDDI
VSSI
C57
58
62
60