●DEVICE OVERVIEW
●This document contains device specific information for the following devices:
●• PIC18F2420 • PIC18LF2420
●• PIC18F2520 • PIC18LF2520
●• PIC18F4420 • PIC18LF4420
●• PIC18F4520 • PIC18LF4520
●This family offers the advantages of all PIC18 micro controllers – namely, high computational performance at an economical price – with the addition of high endurance, Enhanced Flash program memory. On top of these features, the PIC18F2420/2520/4420/4520 family introduces design enhancements that make these microcontrollers a logical choice for many high performance, power sensitive applications.
●Power Managed Modes:
●• Run: CPU on, peripherals on
●• Idle: CPU off, peripherals on
●• Sleep: CPU off, peripherals off
●• Idle mode currents down to 5.8 µA typical
●• Sleep mode current down to 0.1 µA typical
●• Timer1 Oscillator: 1.8 µA, 32 kHz, 2V
●• Watchdog Timer: 2.1 µA
●• Two-Speed Oscillator Start-up
●Peripheral Highlights:
●• High-current sink/source 25 mA/25 mA
●• Three programmable external interrupts
●• Four input change interrupts
●• Up to 2 Capture/Compare/PWM (CCP) modules, one with Auto-Shutdown (28-pin devices)
●• Enhanced Capture/Compare/PWM (ECCP) module (40/44-pin devices only):
● - One, two or four PWM outputs
● - Selectable polarity
● - Programmable dead time
● - Auto-Shutdown and Auto-Restart
●• Master Synchronous Serial Port (MSSP) module
●supporting 3-wire SPI™ (all 4 modes) and I2C™ Master and Slave Modes
●• Enhanced Addressable USART module:
● - Supports RS-485, RS-232 and LIN 1.2
● - RS-232 operation using internal oscillator block (no external crystal required)
● - Auto-Wake-up on Start bit
● - Auto-Baud Detect
●• 10-bit, up to 13-channel Analog-to-Digital Converter module (A/D):
● - Auto-acquisition capability
● - Conversion available during Sleep
●• Dual analog comparators with input multiplexing)
●Flexible Oscillator Structure:
●• Four Crystal modes, up to 40 MHz
●• 4X Phase Lock Loop (available for crystal and internal oscillators)
●• Two External RC modes, up to 4 MHz
●• Two External Clock modes, up to 40 MHz
●• Internal oscillator block:
● - 8 user selectable frequencies, from 31 kHz to 8 MHz
● - Provides a complete range of clock speeds from 31 kHz to 32 MHz when used with PLL
● - User tunable to compensate for frequency drift
●• Secondary oscillator using Timer1 @ 32 kHz
●• Fail-Safe Clock Monitor:
● - Allows for safe shutdown if peripheral clock stops
●Special Microcontroller Features:
●• C compiler optimized architecture:
●\- Optional extended instruction set designed to optimize re-entrant code
●• 100,000 erase/write cycle Enhanced Flash program memory typical
●• 1,000,000 erase/write cycle Data EEPROM memory typical
●• Flash/Data EEPROM Retention: 100 years typical
●• Self-programmable under software control
●• Priority levels for interrupts
●• 8 x 8 Single-Cycle Hardware Multiplier
●• Extended Watchdog Timer (WDT):
●\- Programmable period from 4 ms to 131s
●• Single-supply 5V In-Circuit Serial Programming™ (ICSP™) via two pins
●• In-Circuit Debug (ICD) via two pins
●• Wide operating voltage range: 2.0V to 5.5V
●• Programmable 16-level High/Low-Voltage
●Detection (HLVD) module:
● - Supports interrupt on High/Low-Voltage Detection
●• Programmable Brown-out Reset (BOR
● - With software enable option
