XC68HC705JJ7 Motorola, XC68HC705JJ7 Datasheet - Page 73

• Manufacturer Part Number: XC68HC705JJ7
• Description: MICROCONTROLLER
• Manufacturer: Motorola

5.6.8 External Oscillator and Internal Low-Power Oscillator
MC68HC705JJ7 • MC68HC705JP7 — REV 4
MOTOROLA
A reset, therefore, connects the negative input of comparator 2 to the
channel selection bus, which is switched to V
set up as non-inverting (a higher positive voltage on the positive input
results in a positive output) and both are powered down. The current
source and discharge device on the PB0/AN0 pin is disabled and
powered down. Any analog subsystem interrupt flags are cleared and
the analog interrupt is disabled. Direct drive by comparator 1 to the PB4
pin and the voltage offset to the sample capacitor are disabled (if both
are enabled by the OPT bit being set in the COPR).
A reset presets the oscillator select bits (OM1 and OM2) in the interrupt
status and control register (ISCR) such that the device runs from the
internal oscillator (OM1 = 0, OM2 = 1) which has these effects on the
oscillators:
•
•
•
The internal low-power oscillator is enabled and selected.
The external oscillator is disabled.
The CPU bus clock is driven from the internal low-power oscillator.
Resets
SS
. Both comparators are
Advance Information
Reset States
Resets
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