MCMC68HC05L16 Freescale Semiconductor, Inc, MCMC68HC05L16 Datasheet - Page 13

• Manufacturer Part Number: MCMC68HC05L16
• Description: M68hc05 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

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:
1.3 MCU Structure
Figure 1-1
Freescale Semiconductor
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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)
shows the structure of the MC68HC05L16 MCU.
MC68HC05L16 • MC68HC705L16 Data Sheet, Rev. 4.1
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