GENERAL DESCRIPTION

The MC68HC05BD3 HCMOS microcontroller is a member of the M68HC05 Family of low-cost single-chip microcontrollers. This 8-bit microcontroller unit (MCU) contains an on-chip oscillator, CPU, RAM, ROM, parallel I/O capability with pins programmable as input or output, M-Bus serial interface system (I2C), Pulse Width Modulator, Multi-Function Timer, and Sync Signal Processor. These features make it particularly suitable as a multi-sync computer monitor MCU.

Features

• Fully static chip design featuring the industry standard 8-bit M68HC05 core

• Power saving Wait mode

• 128 bytes of on-chip RAM for MC68HC05BD3

256 bytes for MC68HC705BD3and MC68HC05BD5

• 3.75K-bytes of user ROM for MC68HC05BD3

7.75K-bytes of user ROM for MC68HC05BD5

7.75K-bytes of user EPROM for MC68HC705BD3

• 24 bidirectional I/O lines: 14 dedicated and 10 multiplexed I/O lines.

4 of the 14 dedicated I/O lines and 6 of the MUXed I/O lines have +10V open-drain O/Ps.

• 16 channels PWM outputs: 8 dedicated, +10V open-drain PWM channels and 8 multiplexed with I/O lines of which 6 of them have +10V open-drain outputs.

• M-Bus Serial Interface (I2C-bus†)

• Multi-Function Timer (MFT) with Periodic Interrupt

• COP watchdog reset

• Horizontal and Vertical Sync Signal Processor

• Self-check mode

• Available in 40-pin DIP and 42-pin SDIP packages