MC68HC705K1 Datasheet, PDF (89/140 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

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