MC68HC08BD24 Datasheet, PDF (23/244 Pages) Motorola, Inc – HCMOS Microcontroller Unit

• 32 general purpose input/output (I/O) pins, including:
– 32 shared-function I/O pins
– 4 open-drain I/O pins
• System protection features:
– Optional computer operating properly (COP) reset
– Illegal opcode detection with reset
– Illegal address detection with reset
• ROM security¹
• Master reset pin with internal pull-up and power-on reset
• IRQ with programmable pull-up and schmitt-trigger input
• 42-pin SDIP and 44-pin QFP packages
Features of the CPU08 include the following:
• Enhanced HC05 Programming Model
• Extensive Loop Control Functions
• 16 Addressing Modes (Eight More Than the HC05)
• 16-Bit Index Register and Stack Pointer
• Memory-to-Memory Data Transfers
• Fast 8 × 8 Multiply Instruction
• Fast 16/8 Divide Instruction
• Binary-Coded Decimal (BCD) Instructions
• Optimization for Controller Applications
• Third Party C Language Support
1.4 MCU Block Diagram
Figure 1-1 shows the structure of the MC68HC08BD24.
1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or
copying the ROM difficult for unauthorized users.
MC68HC08BD24 — Rev. 1.1
Freescale Semiconductor
Technical Data
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