McGraw-Hill- PDA Robotics Part 3

Tham khảo tài liệu 'mcgraw-hill- pda robotics part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | PDA Robotics PIC16F876 Microcontroller This powerful 200 nanosecond instruction execution yet easy-to-program only 35 single-word instructions CMOS flash-based 8-bit microcontroller packs Microchip s powerful programmable integrated circuit PIC architecture into an 18-pin package and is upwards compatible with the PIC16C7X PIC16C62xA PIC16C5X and PIC12CXXX devices. The PIC16F876 features 8 MHz internal oscillator 256 bytes of EEPROM data memory a capture compare PWM an addressable USART and two comparators that make it ideal for advantage ana-log integrated level applications in automotive industrial appliances and consumer applications see Figure . PDIP SOÍC MCLR Vpp--- Em RAữ ANù - E RAVAN1 RA2 AN2A REF Ẹ RA3 AN3 VREF Ẹ RA4 T0CKI - E RA5 AN4 SS E Vss E OSCVCLKIN -- OSC2 CLKOUT----- RCO T10SO T1 OKI RC1 T1OSI CCP2- - -E 12 RC2 CCP1 E 13 RC3 SCK SCL E 14 2 3 4 5 6 7 8 9 Ũ10 co co CD 26 27 5 26 25 24 5 23 22 20 J 19 2 18 5 17 2 16 15 5 RB7 PGD RB6 PGC RB4 R03 PGM RB2 RB1 RBŨ INT ---VDO ---Vss - RC7 RX DT RCS TXJCK RC5 SDO RC4 SDI SDA Figure The PIC16F876. See Chapter 7 Programming the PIC16F876 Microcontroller for more information. L7805ACV Voltage Regulator 5 Volts The L7800A series of three terminal positive regulators is available in TO-220 TO-220FP and D2PAK packages and several fixed output voltages making it useful in a wide range of applications. These regulators 18 Chapter 2 Robotic System Overview can provide local on-card regulation eliminating the distribution problem associated with single point regulation. Each type employs internal current limiting thermal shutdown and safe area protection making it essentially indestructible. If adequate heat sinking is provided they can deliver over 1A output current. Although designed primarily as fixed voltage regulators these devices can be used with external components to obtain adjustable voltage and currents. Note PDABot draws very little current so heat sinking is not necessary. Figure shows the .