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DESCRIPTION

The MC68HC05T16 HCMOS microcontroller is a member of the M68HC05 Family of low-cost

single-chip microcontrollers. This 8-bit microcontroller unit (MCU) contains on-chip oscillator,

CPU, RAM, ROM, OSD, M-Bus, PWM, PAC, Timer, A/D converter, I/O and Watchdog Timer.

The MC68HC705T16 is an EPROM version of the MC68HC05T16; it is available in windowed and

OTP 56-pin SDIP packages. All references to the MC68HC05T16 apply equally to the

MC68HC705T16, unless otherwise stated. References specific to the MC68HC705T16 are

italicized in the text.

Features

? 8-bit architecture

? Power saving Stop, Wait modes

? 320 bytes of on-chip RAM (64 bytes for stack)

? 24064 bytes of on-chip ROM/EPROM

? PLL-based, 4-row-buffer On Screen Display (OSD)

? 128-character (4K bytes) OSD ROM/EPROM

? 16-character (512 bytes) dual ported OSD RAM; both readable and writable by CPU

? 40 bidirectional I/O lines: 24 dedicated and 16 multiplexed I/O lines; 12 of the 24 dedicated

I/Os and 10 of the 16 multiplexed I/Os are of +12V open-drain type

? Multi-master M-Bus (I2C?) interface system

? Timer with TCAP input pin and 2 output compare functions

? Pulse Accumulator (PAC)

? 9 channel 7-bit PWM, and single channel 14-bit PWM

? 2 channel 5-bit Analog to Digital Converter

? COP watchdog system

? Available in 56-pin SDIP package