MC68HC11P2 Datasheet, PDF (74/268 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Parallel Input/Output
Table 4-1. Port configuration
Port
A
B
C
D
E
F
G
H
Input
pins
—
—
—
—
8
—
—
—
Output
pins
—
—
—
—
—
—
—
—
Bidirectional
pins
Alternate functions
8
Timer
8
High order address
8
Data bus
6
SPI and SCI1
—
A/D converter
8
Low order address
8
R/W on PG7
8
PWM and SCI2/3 (with MI BUS)
NOTE:
Do not confuse pin function with the electrical state of that pin at reset.
All general-purpose I/O pins that are configured as inputs at reset are in
a high-impedance state and the contents of the port data registers are
undefined; in port descriptions, a ‘u’ indicates this condition. The pin
function is mode dependent.
4.3 Port A
Port A is an 8-bit bidirectional port, with both data and data direction
registers. In addition to their I/O capability, port A pins are shared with
timer functions, as shown in the following table.
Pin
Alternate function
PA0 IC3
PA1 IC2
PA2 IC1
PA3 OC5 and/or OC1, or IC4
PA4 OC4 and/or OC1
PA5 OC3 and/or OC1
PA6 OC2 and/or OC1
PA7 PAI and/or OC1







See Timing System


for more information.





On reset the pins are configured as general purpose high-impedance
inputs.
Technical Data
Parallel Input/Output
For More Information On This Product,
Go to: www.freescale.com
MC68HC11P2 — Rev 1.0