Freescale Semiconductor MC68HC08KH12 - Manual (Page 31)

MC68HC(7)08KH12 — Rev. 1.1 Advance Information
Freescale Semiconductor 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 .)