MC705L16CFUE datasheet(13/146 Pages) FREESCALE

13 / 146 page

MC68HC05L16 • MC68HC705L16 Data Sheet, Rev. 4.1

Freescale Semiconductor

Chapter 1

General Description

1.1 Introduction

The MC68HC05L16 is an 80-pin microcontroller unit (MCU) with highly sophisticated on-chip peripheral

functions. The memory map includes 16 Kbytes of user ROM and 512 bytes of RAM. The MCU has five

parallel ports: A, B, C, D, and E. The MC68HC05L16 includes a timebase circuit, 8- and 16-bit timers, a

computer operating properly (COP) watchdog timer, liquid crystal display (LCD) drivers, and a simple

serial peripheral interface (SSPI).

1.2 Features

Features of the MC68HC05L16 MCU include:

•

Low-cost HC05 core

•

16,400 Bytes of mask ROM, including 16 bytes of user vectors and 512 bytes of on-chip RAM

•

16 bidirectional input-output (I/O) lines

•

Eight input-only lines

•

15 output-only lines, including 8-bit key wakeup interrupts

•

Pullup resistors options

•

Open-drain outputs options

•

Two interrupt request (IRQ) inputs

•

16-bit timer with input capture and output compare (timer 1)

•

8-bit event counter/modulus clock divider (timer 2)

•

Simple serial peripheral interface (SSPI)

•

LCD drivers — 1-to-4 backplane drivers x 27-to-39 frontplane drivers

•

On-chip timebase circuits with COP watchdog timer and timebase interrupts

•

Dual oscillators and selectable system clock frequency

•

Power-saving stop mode and wait mode

•

80-pin quad flat pack (QFP)

1.3 MCU Structure

Figure 1-1 shows the structure of the MC68HC05L16 MCU.

MC705L16CFUE Datasheet(PDF) 13 Page - Freescale Semiconductor, Inc

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