M68HC11CPU datasheet(12/31 Pages) MOTOROLA

12 / 31 page

Motorola Master Selection Guide

Single-Chip Microcontrollers (AMCU)

2.6–12

Modular Microcontrollers

Modular microcontrollers are another of the innovations

that make Motorola a leader in single–chip control systems.

Modular controllers are built up from standard modules that

interface via a common intermodule bus (IMB). The modular

concept allows rapid design and manufacture of controllers

tailored for specific applications.

Intermodule Bus Peripherals

Each modular microcontroller incorporates a state–of–the

art pipelined CPU module, a sophisticated integration module,

and

number

special–purpose

modules.

The

rapidly–growing library of special–purpose modules includes

programmable timers, serial communication interfaces,

analog–to–digital converters, and a variety of memory

modules.

Central Processing Units

CPU16

• 16–Bit Architecture

• Full Set of 16–Bit Instructions

• Three 16–Bit Index Registers

• Two 16–Bit Accumulators

• One Megabyte of Program Memory and One Megabyte

of Data Memory

• Source code compatible with the M68HC11 CPU

• Control–Oriented Digital Signal Processing Capability

• High–Level Language Support

• Fast Interrupt Response Time

• Fully Static Implementation

• Low Power Stop Operation

• Background Debugging Mode

• Hardware Breakpoint Signal

CPU32

• 32–Bit Internal Data Path and Arithmetic Hardware

• 32–Bit Internal Address Bus – 24–Bit External Address Bus

• Eight 32–Bit General–Purpose Data Registers

• Seven 32–Bit General–Purpose Address Registers

• Separate User and Supervisor Stack Pointers and

Address Spaces

• Separate Program and Data Address Spaces

• Virtual Memory Implementation

• Enhanced Addressing Modes

• Object Code Compatible with M68000 Family

• Improved Exception Handling for Controller Applications

• Rich Instruction Set

• Fully Static Implementation

• Low Power Stop Operation

• Background Debugging Mode

• Hardware and Software Breakpoints

• Trace on Change of Flow

Integration Modules

System Integration Module (SIM)

• Manages controller internal and external bus interfaces

• Provides device interrupt arbitration

• Spurious interrupt monitor

• Twelve programmable chip–select outputs

• Watchdog timer, clock monitor, and bus monitor

• PLL clock synthesizer

Single–Chip Integration Module (SCIM)

• Manages controller internal and external bus interfaces

• Provides device interrupt arbitration

• Spurious interrupt monitor

• Single–chip operation with address and data bus pins

configured as I/O ports

• Optional Fully or Partially–expanded bus operation

• Nine general–purpose chip select outputs

• Emulation mode chip–select outputs can be used to

address a port replacement unit and external emulation

RAM

• Watchdog timer, clock monitor, and bus monitor

• PLL clock synthesizer

• Interrupt request inputs can be configured for edge or

level detection

• Reduced pin SCIM (RPSCIM) available with 5 chip selects

Timers

Time Processor Unit (TPU)

• On–chip microengine dedicated to high–speed timing tasks

• Two independent 16–bit counters used as basis for

timing tasks

• Real–time task scheduler

• Executes a programmed series of functions to perform

complex tasks

• Each of 16 orthogonal channels can perform available

time functions

• Functions contained in dedicated control store or in

MCU RAM

• TPU communicates to CPU via dual port RAM

General Purpose Timer (GPT)

• Two 16–bit free–running counters

• Three input capture channels

• Four output compare channels

• One input capture/output compare channel

• One pulse accumulator/event counter input

• Two pulse–width modulation outputs

• Pulse accumulator input

Configurable Timer Module (CTM)

• Modular timer system combining different configurations

of timer submodules:

• CPSM–6 TAP counter prescaler

• FCSM–16–bit free running up counter

• MCSM–16–bit modulus up counter

• SASM–(Single Action) two I/O pins for 16–bit input

capture or output compare functions

• DASM–(Dual Action) one I/O pin for 16–bit I/C, O/C,

PWM, or output function

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