8-bit PICmicro microcontroller, 64 KB, 64 MHz, TQFP-44

PIC18F2XK20/4XK20
28/40/44-Pin Flash Microcontrollers with XLP Technology

High-Performance RISC CPU
- C Compiler Optimized Architecture:
- Optional extended instruction set designed to optimize re-entrant code
- Up to 1024 bytes Data EEPROM
- Up to 64 Kbytes Linear Program Memory Addressing
- Up to 3936 bytes Linear Data Memory Addressing
- Up to 16 MIPS Operation
- 16-bit Wide Instructions, 8-bit Wide Data Path
- Priority Levels for Interrupts
- 31-Level, Software Accessible Hardware Stack
- 8 x 8 Single-Cycle Hardware Multiplier

Special Microcontroller Features
- Operating Voltage Range: 1.8V to 3.6V
- Self-Programmable under Software Control
- Programmable 16-Level High/Low-Voltage Detection (HLVD) module:
- Interrupt on High/Low-Voltage Detection
- Programmable Brown-out Reset (BOR): - With software enable option
- Extended Watchdog Timer (WDT): - Programmable period from 4 ms to 131s
- Single-Supply 3V In-Circuit Serial Programming™ (ICSP™) via Two Pins
- In-Circuit Debug (ICD) via Two Pins

Flexible Oscillator Structure
- Precision 16 MHz Internal Oscillator Block:
- Factory calibrated to ± 1%
- Software selectable frequencies range of 31 kHz to 16 MHz
- 64 MHz performance available using PLL, no external components required
- Four Crystal Modes up to 64 MHz
- Two External Clock Modes up to 64 MHz
- 4X Phase Lock Loop (PLL)
- Secondary Oscillator using Timer1 @ 32 kHz
- Fail-Safe Clock Monitor:
- Allows for safe shutdown, if peripheral clock stops
- Two-Speed Oscillator Start-up

Extreme Low-Power Management with XLP
- Sleep Mode: < 100 nA @ 1.8V
- Watchdog Timer: < 800 nA @ 1.8V
- Timer1 Oscillator: < 800 nA @ 32 kHz and 1.8V

Analog Features
- Analog-to-Digital Converter (ADC) Module:
- 10-bit resolution, 13 External Channels
- Auto-acquisition capability
- Conversion available during Sleep
- 1.2V Fixed Voltage Reference (FVR) channel
- Independent input multiplexing
- Analog Comparator Module:
- Two rail-to-rail analog comparators
- Independent input multiplexing
- Voltage Reference (CVREF) Module
- Programmable (% VDD), 16 steps
- Two 16-level voltage ranges using VREF pins

Peripheral Highlights
- Up to 35 I/O Pins plus 1 Input-only Pin:
- High-Current Sink/Source 25 mA/25 mA
- Three programmable external interrupts
- Four programmable interrupt-on-change
- Eight programmable weak pull-ups
- Programmable slew rate
- Capture/Compare/PWM (CCP) Module
- Enhanced CCP (ECCP) module:
- One, two or four PWM outputs
- Selectable polarity
- Programmable dead time
- Auto-shutdown and auto-restart
- Master Synchronous Serial Port (MSSP) Module
- 3-wire SPI (supports all four modes)
- I2C™ Master and Slave modes with address mask
- Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART) Module:
- Supports RS-485, RS-232 and LIN
- RS-232 operation using internal oscillator
- Auto-Wake-up on Break
- Auto-Baud Detect