GENERAL DESCRIPTION
The PIC16HV540 from Microchip Technology is a low cost, high-performance, 8-bit, fully-static, EPROM-based CMOS microcontroller. It is pin and software compatible with the PIC16C5X family of devices.
   
High-Performance RISC CPU:
• Only 33 single word instructions to learn
• All instructions are single cycle (200 ns) except for
    program branches which are two-cycle
• Operating speed: DC - 20 MHz clock input
                               DC - 200 ns instruction cycle
• 12-bit wide instructions
• 8-bit wide data path
• Seven special function hardware registers
• Four-level deep hardware stack
• Direct, indirect and relative addressing modes for
    data and instructions
   
Peripheral Features:
• 8-bit real time clock/counter (TMR0) with 8-bit programmable prescaler
• Power-On Reset (POR)
• Brown-Out Protection
• Device Reset Timer (DRT) with short RC oscillator start-up time
• Programmable Watchdog Timer (WDT) with its
    own on-chip RC oscillator for reliable operation
• Sleep Timer
• 8 High Voltage I/O
• 4 Regulated I/O
• Wake up from SLEEP on-pin change
• Programmable code protection
• Power saving SLEEP mode
• Selectable oscillator options:
    - RC: Low-cost RC oscillator
    - XT: Standard crystal/resonator
    - HS: High speed crystal/resonator
    - LP: Power saving, low frequency crystal
• Glitch filtering on MCLR and pin change inputs
   
CMOS Technology:
• Selectable on-chip 3V/5V Regulator
• Low-power, high-speed CMOS EPROM technology
• Fully static design
• Wide-operating voltage range:
    - 3.5V to 15V
• Temperature range:
    - Commercial: 0°C to 70°C
    - Industrial: -40°C to 85°C
• Low-power consumption
    - < 2 mA typical @ 5V, 4 MHz
    - 15 µA typical @ 3V, 32 kHz
    - < 4.5 µA typical standby current @ 15V (with
        WDT disabled), 0°C to 70°C