MC68HC705J MOTOROLA [Motorola, Inc], MC68HC705J Datasheet - Page 25

• Manufacturer Part Number: MC68HC705J
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

1.4 Programmable Options
1.5 Pin Assignments
1.5.1 V
MC68HC705J1A — Rev. 4.0
MOTOROLA
DD
and V
SS
The options in
(MOR).
Figure 1-2
V
from a single power supply.
Very fast signal transitions occur on the MCU pins, placing high,
short-duration current demands on the power supply. To prevent noise
problems, take special care as
capacitors as close as possible to the MCU. C2 is an optional bulk
current bypass capacitor for use in applications that require the port pins
to source high current levels.
COP watchdog timer
External interrupt triggering
Port A IRQ pin interrupts
Port pulldown resistors
STOP instruction mode
Crystal oscillator internal resistor
EPROM security
Short oscillator delay counter
DD
and V
SS
shows the MC68HC705J1A pin assignments.
Feature
are the power supply and ground pins. The MCU operates
Table 1-1
General Description
Table 1-1. Programmable Options
are programmable in the mask option register
Enabled or disabled
Edge-sensitive only or edge- and level-sensitive
Enabled or disabled
Enabled or disabled
Stop mode or halt mode
Enabled or disabled
Enabled or disabled
Enabled or disabled
Figure 1-3
shows, by placing the bypass
Option
Programmable Options
General Description
Technical Data
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