General Description
Pin Assignments
MC68HC(7)08KH12
—
Rev. 1.0
Advance Information
MOTOROLA
General Description
31
1.5.8 Port A Input/Output (I/O) Pins (PTA7–PTA0)
PTA7–PTA0 are general-purpose bidirectional I/O port pins.
(See
Section 12. I/O Ports
.) Each pin contains a software configurable pull-
up device when the pin is configured as an input.
(See
12.9 Port
Options
.)
1.5.9 Port B I/O Pins (PTB7–PTB0)
PTB7–PTB0 are general-purpose bidirectional I/O port pins.
(See
Section 12. I/O Ports
.) Each pin contains a software configurable pull-
up device when the pin is configured as an input.
(See
12.9 Port
Options
.)
1.5.10 Port C I/O Pins (PTC4–PTC0)
PTC4–PTC0 are general-purpose bidirectional I/O port pins.
(See
Section 12. I/O Ports
.) Port C pins are software configurable to be LED
Direct Drive ports. Each pin contains a software configurable pull-up
device when the pin is configured as an input.
(See
12.9 Port Options
.)
1.5.11 Port D I/O Pins (PTD7/KBD7–PTD0/KBD0)
PTD7/KBD7–PTD0/KBD0 are general-purpose bidirectional I/O port
pins.
(See
Section 12. I/O Ports
.) Any or all of the port D pins can be
programmed to serve as external interrupt pins.
(See
Section 15.
Keyboard Interrupt Module (KBI)
.)
1.5.12 Port E I/O Pins (PTE4, PTE3/KBE3, PTE2/KBE2/TCH1,
PTE1/KBE1/TCH0, PTE0/KBE0/TCLK)
Port-E is a 5-bit special function port which shares three of its pins with
the Timer Interface Module and four of its pins with Keyboard Interrupt
Module (
see
Section 12. I/O Ports
,
Section 15. Keyboard Interrupt
Module (KBI)
and
Section 11. Timer Interface Module (TIM)
). In
addition, PTE3-PTE0 has built-in optical coupling interface for optical
mouse application.
(See
Section 12. I/O Ports
.)