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GENERAL DESCRIPTION

The MC68HC05BD7 HCMOS microcontroller is a member of the M68HC05 Family of lowcost

single-chip microcontrollers. It is particularly suitable as multi-sync computer monitor

controller. This 8-bit microcontroller unit (MCU) contains an on-chip oscillator, CPU, RAM,

ROM, DDC12AB module, parallel I/O, Pulse Width Modulator, Multi-Function Timer, 6-bit

ADC, and SYNC Processor.

Features

? HC05 Core

? Low cost, HCMOS technology

? 40-pin DIP and 42-pin SDIP packages

? 256 Bytes of RAM for HC05BD2

? 384 Bytes of RAM for HC05BD7HC705BD7

? 5.75K-Bytes of User ROM for HC05BD2

? 11.75K-Bytes of User ROM for HC05BD7

? 11.5K-Bytes of User EPROM for HC705BD7

? 26 Bidirectional I/O lines: 14 dedicated and 12 multiplexed I/O lines. 4 of

the 14 dedicated I/O lines and 6 of the 12 multiplexed I/O lines have max.

+12V or +5V open-drain output buffers

? 16 x 8-bit PWM channels: Two 8-bit PWM channels have +12V opendrain

outputs: 8 dedicated 8-bit PWM channels have +5V open-drain

output options

? 6-bit ADC with 4 selectable input channels

? Multi-Function Timer (MFT) with Periodic Interrupt

? Sync Signal Processor module for processing horizontal, vertical,

composite, and SOG SYNC signals; frequency counting; polarity

detection; polarity controlled HSYNO and VSYNO or extracted VSYNC

outputs, and CLAMP pulse output

? DDC12AB? module contains DDC1 hardware and multi-master I2C??

hardware for DDC2AB protocol

? Software maskable Edge-Sensitive or Edge and Level-Sensitive External

Interrupt

? COP watchdog Reset

? Power-On Reset

? Power Saving WAIT Mode; STOP Mode not implemented

? Similar to MC6800

? 8 X 8 unsigned multiply instruction

? Efficient use of program space

? Versatile interrupt handling

? Software programmable external interrupt options

? True bit manipulation

? Addressing modes with indexed addressing for tables

? Efficient instruction set

? Memory mapped I/O

? Upward software compatible with the MC146805 CMOS family