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