MC68HC11KA4TS Datasheet, PDF (31/68 Pages) Motorola, Inc – 8-Bit Microcontroller

6 Parallel Input/Output
The MC68HC11KA4/KA2 has up to 51 input/output lines, depending on the operating mode. To en-
hance the I/O functions, the data bus of this microcontroller is non-multiplexed. The following table is a
summary of the configuration and features of each port.
Port
Port A
Port B
Port C
Port D
Port E
Port F
Port G
Port H
Input Pins
—
—
—
—
8*
—
—
—
Output Pins
—
—
—
—
—
—
—
—
Bidirectional Pins
8
8
8
6
—
8
1
4
Shared Functions
Timer
High Order Address
Data Bus
SCI and SPI
A/D Converter
Low Order Address
R/W Signal
PWMs
* Only four pins on 64-pin version.
CONFIG — COP, ROM Mapping, EEPROM Enables
Bit 7
6
ROMAD
—
RESET:
—
1
5
CLKX
—
4
PAREN
—
3
NOSEC
—
2
NOCOP
—
1
ROMON
—
ROMAD — ROM Mapping Control
Refer to 2 Operating Modes and On-Chip Memory.
$003F
Bit 0
EEON
—
Bit 6 — Not implemented
Always reads one
CLKX — XOUT Clock Enable
Refer to 2 Operating Modes and On-Chip Memory.
PAREN — Pull-Up Assignment Register Enable
0 = Pull-ups always disabled regardless of state of bits in PPAR
1 = Pull-ups either enabled or disabled through PPAR
NOSEC — Security Disable
Refer to 2 Operating Modes and On-Chip Memory.
NOCOP — COP System Disable
Refer to 5 Resets and Interrupts.
ROMON — ROM/EPROM Enable
Refer to 2 Operating Modes and On-Chip Memory.
EEON — EEPROM Enable
Refer to 2 Operating Modes and On-Chip Memory.
MC68HC11KA4
MC68HC11KA4TS/D
MOTOROLA
31