MC68HC705 MOTOROLA [Motorola, Inc], MC68HC705 Datasheet - Page 30

• Manufacturer Part Number: MC68HC705
• Description: HCMOS Microcontroller Unit
• Manufacturer: MOTOROLA [Motorola, Inc]

General Description
1.7.3 External Reset Pin (RESET)
1.7.4 External Interrupt Request Pin (IRQ)
1.7.5 Input Capture Pin (TCAP)
1.7.6 Output Compare Pin (TCMP)
1.7.7 Port A I/O Pins (PA7–PA0)
1.7.8 Port B I/O Pins (PB7–PB0)
Technical Data
30
A logic 0 on the bidirectional RESET pin forces the MCU to a known
startup state. The RESET pin contains an internal Schmitt trigger as part
of its input to improve noise immunity. See
The IRQ pin is an asynchronous external interrupt pin. The IRQ pin
contains an internal Schmitt trigger as part of its input to improve noise
immunity. See
The TCAP pin is the input capture pin for the on-chip capture/compare
timer. The TCAP pin contains an internal Schmitt trigger as part of its
input to improve noise immunity. See
Timer.
The TCMP pin is the output compare pin for the on-chip
capture/compare timer. See
These eight I/O lines comprise port A, a general-purpose, bidirectional
I/O port. The pins are programmable as either inputs or outputs under
software control of the data direction registers. See
These eight I/O pins comprise port B, a general-purpose, bidirectional
I/O port. The pins are programmable as either inputs or outputs under
software control of the data direction registers. Port B pins also can be
configured to function as external interrupts. See
4.3.2 External Interrupt
General Description
Section 8. Capture/Compare
Section 8. Capture/Compare
(IRQ).
Section 5.
MC68HC705C8A — Rev. 2.0
7.4 Port
7.3 Port
Resets.
B.
Timer.
MOTOROLA
A.