Microchip PIC18F2520 Embedded Firmware Extraction
Microchip PIC18F2520 Embedded Firmware Extraction needs not only know the memory structure, but also the oscillator structure since it is also important for the power glitch method:
Flexible Oscillator Structure:
· Four Crystal modes, up to 40 MHz
· 4x Phase Lock Loop (PLL) – 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:
– Fast wake from Sleep and Idle, 1 ìs typical
– 8 use-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
Microchip PIC18F2520 Embedded Firmware Extraction
Converter module:
– Auto-acquisition capability
– Conversion available during Sleep
· Dual Analog Comparators with Input Multiplexing
· Programmable 16-Level High/Low-Voltage
Detection (HLVD) module:
– Supports interrupt on High/Low-Voltage Detection
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
High-Current Sink/Source 25 mA/25 mA
Three Programmable External Interrupts
Four Input Change Interrupts
Up to 2 Capture/Compare/PWM (CCP) modules,
· Priority Levels for Interrupts
· 8 x 8 Single-Cycle Hardware Multiplier
· Extended Watchdog Timer (WDT):
– Programmable period from 4 ms to 131s
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