MC68HC711xxxx Motorola, MC68HC711xxxx Datasheet - Page 109
MC68HC711xxxx
Manufacturer Part Number
MC68HC711xxxx
Description
Microcontrollers
Manufacturer
Motorola
Datasheet
1.MC68HC711XXXX.pdf
(268 pages)
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6.1 Introduction
6.2 Port A
M68HC11E Family — Rev. 5
MOTOROLA
Data Sheet — M68HC11E Family
All M68HC11 E-series MCUs have five input/output (I/O) ports and up to 38 I/O
lines, depending on the operating mode. Refer to
ports and their shared functions.
Port pin function is mode dependent. Do not confuse pin function with the electrical
state of the pin at reset. Port pins are either driven to a specified logic level or are
configured as high-impedance inputs. I/O pins configured as high-impedance
inputs have port data that is indeterminate.
In port descriptions, an I indicates this condition. Port pins that are driven to a
known logic level during reset are shown with a value of either 1 or 0. Some control
bits are unaffected by reset. Reset states for these bits are indicated with a U.
Port A shares functions with the timer system and has:
Port A
Port B
Port C
Port D
Port E
Port
•
•
•
Three input-only pins
Three output-only pins
Two bidirectional I/O pins
Input
Pins
—
—
—
3
8
Parallel Input/Output (I/O) Ports
Output
Pins
—
—
—
3
8
Section 6. Parallel Input/Output (I/O) Ports
Table 6-1. Input/Output Ports
Bidirectional
Pins
—
—
2
8
6
Timer
High-order address
Low-order address and data bus
Serial communications interface (SCI)
and serial peripheral interface (SPI)
Analog-to-digital (A/D) converter
Table 6-1
Shared Functions
for a summary of the
Data Sheet
109
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