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
Hardware 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

Software Features
• 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