MC68HC05JJ6 Datasheet, PDF (78/216 Pages) Freescale Semiconductor, Inc – General Release Specification Microcontrollers

Parallel Input/Output
7.2 Introduction
The MC68HC05JJ6 has 14 bidirectional I/O pins which form two parallel
I/O ports, A and B. The MC68HC05JP6 has 22 bidirectional I/O pins
which form three parallel I/O ports, A, B and C. Each I/O pin is
programmable as an input or an output. The contents of the data
direction registers determine the data direction of each of the I/O pins.
All I/O pins have software programmable pulldown devices which can be
enabled or disabled by the software pulldown inhibit mask option.
7.3 Port A
Port A is a 6-bit, general-purpose bidirectional I/O port with these
features:
• Individual programmable pulldown devices
• High current sinking capability on all port A pins with a maximum
of 15 mA per pin or a total of 40 mA for all six pins
• High current sourcing capability on all port A pins with a maximum
of 5 mA per pin or a total of 20 mA for all six pins
• External interrupt capability (pins PA3–PA0)
General Release Specification
78
MC68HC05JJ6/MC68HC05JP6 — Rev. 3.2
Parallel Input/Output
Freescale Semiconductor