mc68hc705k1 Freescale Semiconductor, Inc, mc68hc705k1 Datasheet - Page 89

• Manufacturer Part Number: mc68hc705k1
• Description: Hcmos Microcontroller Unit
• Manufacturer: Freescale Semiconductor, Inc

MC68HC705K1 — Rev. 2.0
NOTE:
PIRQ — Port A IRQ Enable Bit
LEVEL — External Interrupt Sensitivity Bit
COPEN — COP Watchdog Enable Bit
In 3-pin RC oscillator configurations, the personality EPROM
(PEPROM) cannot be programmed by user software. If the voltage on
IRQ/V
configuration and device operation will be disrupted.
This EPROM bit enables the PA3–PA0 pins to function as external
interrupt sources.
This EPROM bit makes the external interrupt inputs level-triggered as
well as edge-triggered.
This EPROM bit enables the COP watchdog.
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1 = PA3–PA0 enabled as external interrupt sources
0 = PA3–PA0 not enabled as external interrupt sources
1 = IRQ/V
0 = IRQ/V
1 = COP watchdog enabled
0 = COP watchdog disabled
PP
is raised above V
PA3–PA0 pins positive-edge triggered and high-level triggered
positive-edge triggered only
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PP
PP
EPROM/OTPROM
pin negative-edge triggered and low-level triggered;
pin negative-edge triggered only; PA3–PA0 pins
DD
, the oscillator will revert to a 2-pin oscillator
Mask Option Register
EPROM/OTPROM
Technical Data