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)