MCMC68HC05L16 Freescale Semiconductor, Inc, MCMC68HC05L16 Datasheet - Page 51

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MCMC68HC05L16

Manufacturer Part Number
MCMC68HC05L16
Description
M68hc05 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
Chapter 6
Parallel Input/Output (I/O)
6.1 Introduction
The MCU has five parallel ports:
Most of these 39 I/O pins serve multiple purposes depending on the configuration of the MCU system.
The configuration is in turn controlled by hardware mode selection as well as internal control registers.
Freescale Semiconductor
Port A has eight I/O pins.
Port B has eight input/only pins.
Port C has eight I/O pins.
Port D has seven output-only pins.
Port E has eight output-only pins.
LATCHED OUTPUT
MC68HC05L16 • MC68HC705L16 Data Sheet, Rev. 4.1
DATA DIRECTION
REGISTER BIT
Figure 6-1. Port I/O Circuitry for One Bit
DATA BIT
INPUT
REG
BIT
INPUT
I/O
OUTPUT
PIN
I/O
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