Microchip

PIC18F252- 10 bit Microcontroller with 2k Bytes Flash Program Memory and USART

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Features High-Performance RISC CPU - Source code compatiable with the PIC16 and PIC17 instruction sets - Linear program memory addressing to 32 Kbytes - DC - 40 MHz osc./clock input - 16-bit wide instructions, 8-bitwide data path - Priority levels for interrupts - 8 x 8 Single Cycle Hardware Multiplier Peripheral Features - High current sink/source 25 mA/25 mA - Three external interrupt pins - Two 16-bit timer/counter (TMR1, TMR3) - One 8-bit/16-bit timer/counter with prescaler - One 8-bit timer/counter with 8-bit period register - Capture 16-bit, max. resolution 6.25 ns.(TCY/16) - Compare 16-bit, max. resolution 100 ns. - 3-wire SPI (supports all 4 SPI modes) - I ²C Master and Slave mode - Supports RS-485 and RS-232 - Parallel Slave Port (PSP) module Special Microcontroller Features - Power-On Reset - Power-up Timer (PWRT) and Oscillator Start-Up Timer (OST) - Power-On Reset - 100,000 erase/write cycle Enhanced FLASH program memory typical - 1,000,000 erase/write cycle Data EEPROM memory - Self-reprogrammable under software control - Watchdog Timer (WDT) with its own On-Chip RC oscillator - Programmable code protection - Power saving SLEEP mode - 4X Phase Lock Loop (of primary oscillator) - Secondary Oscillator (32kHz) clock input - Single supply 5V In-circuit Serial Programming via two pins - In-Circuit Debug (ICD Analog Features - Compatiable 10-bit Analog-to-Digital Converter module (A/D) - Programmable Low Voltage Detection (PLVD) - Programmable Brown-out Reset(BOR) CMOS Technology - Low power, high speed FLSH/EEPROM technology - Fully static design - Wide operating voltage range (2.0V to 5.5V) - Industrial and Extended temperature ranges - < 1.6 mA typical @ 5V, 4 MHz

Pin Description Pin Number Description 1 MCLR/VPP 2 RA0/AN0 3 RA1/AN1 4 RA2/AN2/VREF- 5 RA3/AN3/VREF+ 6 RA4/T0CKI 7 RA5/AN4/SS/LVDIN 8 VSS 9 OSC1/CLKI 10 OSC2/CLKO/RA6 11 RC0/T1OSO/T1CKI 12 RC1/T1OSI/CCP2 13 RC2/CCP1 14 RC3/SCK/SCL 15 RC4/SDI/SDA 16 RC5/SDO 17 RC6/TX/CK 18 RC7/RX/DT 19 VSS 20 VDD 21 RB0/INT0 22 RB1/INT1 23 RB2/INT2 24 RB3/CCP2 25 RB4 26 RB5/PGM 27 RB6/PGC 28 RB7/PGD

Pin Layout Dimensional Drawing

Technical Data Data Sheet Microchip - Data Sheet for PIC18FXX2 Application Notes Microchip - PIC Application Notes