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)