MC68HC705J1A

Manufacturer Part NumberMC68HC705J1A
ManufacturerMotorola
MC68HC705J1A datasheet
 


Specifications of MC68HC705J1A

CaseDIP-20L  
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PA0 PA7

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1.7 IRQ/V
PP
The external interrupt/programming voltage pin (IRQ/V
asynchronous IRQ interrupt function of the CPU. Additionally, it is used
to program the user EPROM and mask option register. (See
Memory
The LEVEL bit in the mask option register provides negative
edge-sensitive triggering or both negative edge-sensitive and low
level-sensitive triggering for the interrupt function.
If level-sensitive triggering is selected, the IRQ/V
external resistor to V
used, it must be tied to the V
The IRQ/V
to improve noise immunity. The voltage on this pin should not exceed
V
DD
NOTE:
The mask option register can enable the PA0–PA3 pins to function as
external interrupt pins.
1.8 PA0–PA7
These eight input/output (I/O) lines comprise port A, a general-purpose,
bidirectional I/O port. See
for information on PA0–PA3 external interrupts.
1.9 PB0–PB5
These six I/O lines comprise port B, a general-purpose, bidirectional I/O
port.
MC68HC705J1A — Rev. 4.0
MOTOROLA
and
Section 8. External Interrupt Module
for wired-OR operation. If the IRQ/V
DD
DD
pin contains an internal Schmitt trigger as part of its input
PP
except when the pin is being used for programming the EPROM.
Section 8. External Interrupt Module (IRQ)
General Description
General Description
) drives the
PP
(IRQ).)
input requires an
PP
supply.
IRQ/V
PP
Section 2.
pin is not
PP
Technical Data
31