Features
• Low-Cost HC05 Core
• 16-Pin PDIP or SOIC Package
• 928 Bytes of User EEPROM (Including Eight Bytes of User
Vectors)
• 64 Bytes of User RAM
• 128 Bits of Personality EEPROM (Not Memory Mapped)
Programmed using User Software or during User EEPROM
Programming
• On-Chip Charge Pump for In-Circuit Programming of the
Personality EEPROM at 3.0 to 5.5 Vdc.
• 8-Bit Free-Running Timer
• 4-Stage Selectable Real-Time Interrupt Generator
• 10 Bidirectional Input/Output (I/O) Lines Including:
– 8 mA Sink Capability on Four I/O Pins (PA7–PA4)
– Mask Option Register Bit for Software Programmable
Pulldowns on All I/O Pins
– Mask Option Register Bit for Port Interrupts on Four I/O Pins
(PA3–PA0) (Keyboard Scan Feature)
• IRQ Interrupt Hardware Mask, Flag Bit, and Request Bit
• Mask Option Register Bit for Sensitivity on IRQ Interrupt (Edgeand
Level-Sensitive or Edge-Sensitive Only)
• On-Chip Oscillator (Mask Option Register Bits for Crystal/Ceramic
Resonator Oscillator with Internal 2 MW Resistor, and 2-Pin or 3-
Pin Resistor Capacitor (RC) Oscillator)
• Mask Option Register Bit for Reduced Startup Delay Time with RC
Oscillator Options
• Mask Option Register Bit for Computer Operating Properly (COP)
Watchdog System
• Power-Saving Stop and Wait Mode Instructions
• Mask Option Register Bit to Convert STOP Instruction to Halt
Mode
• Illegal Address Reset
• Internal Steering Diode and Pullup Resistor on RESET Pin to VDD
• Internal RESET Pin Pulldown from COP Watchdog and ILADR