SPMCK16Z4MPV20 datasheet(35/500 Pages) FREESCALE

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M68HC16 Z SERIES

OVERVIEW

USER’S MANUAL

3-1

SECTION 3

OVERVIEW

This section provides general information on M68HC16 Z-series MCUs. It lists fea-

tures of each of the modules, shows device functional divisions and pin assignments,

summarizes signal and pin functions, discusses the intermodule bus, and provides

system memory maps. Timing and electrical specifications for the entire microcontrol-

ler and for individual modules are provided in APPENDIX A ELECTRICAL CHARAC-

TERISTICS. Comprehensive module register descriptions and memory maps are

provided in APPENDIX D REGISTER SUMMARY.

3.1 M68HC16 Z-Series MCU Features

The following paragraphs highlight capabilities of each of the MCU modules. Each

module is discussed separately in a subsequent section of this manual.

3.1.1 Central Processor Unit (CPU16/CPU16L)

• 16-bit architecture

• Full set of 16-bit instructions

• Three 16-bit index registers

• Two 16-bit accumulators

• Control-oriented digital signal processing capability

• Addresses up to 1 Mbyte of program memory; 1 Mbyte of data memory

• Background debug mode

• Fully static operation

• Expanded LPSTOP operation on CPU16L (MC68HC16Z4, MC68CK16Z4 only)

3.1.2 System Integration Module (SIM/SIML)

• External bus support

• Programmable chip-select outputs

• System protection logic

• Watchdog timer, clock monitor, and bus monitor

• Two 8-bit dual function input/output ports

• One 7-bit dual function output port

• Phase-locked loop (PLL) clock system

• Expanded LPSTOP operation on SIML (MC68HC16Z4, MC68CK16Z4 only)

3.1.3 Standby RAM (SRAM)

• 1-Kbyte static RAM (MC68HC16Z1/Z4 only)

• 2-Kbyte static RAM (MC68HC16Z2 only)

• 4-Kbyte static RAM (MC68HC16Z3 only)

• External standby voltage supply input

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