This document provides information about Microchip Technology, a manufacturer of microcontrollers and analog semiconductors. It discusses Microchip's headquarters and wafer fabrication facilities. It also lists some of Microchip's main competitors in the semiconductor industry. Additionally, it gives an overview of Microchip's microcontroller architectures like PIC and some key variants. It then presents a problem about designing a circuit to turn on an LED based on voltage levels. It provides information about analog to digital converters and how they work. Finally, it discusses the PIC12F683 microcontroller and some of its analog to digital converter registers used to read voltage levels.

1. Presented by
Jabez Winston C
Jagdeesh S
Shibin B

2. About Microchip
 Microchip Technology is an American manufacturer of
microcontroller, memory and analog semiconductors.
 HQ - Chandler, Arizona
 Wafer Fabs - Tempe, Arizona and Gresham, Oregon
 Assembly/Test facilities - Chachoengsao, Thailand

4. Competitors to Microchip
 Analog Devices
 Atmel
 Freescale
 Infineon
 Maxim Integrated Products
 NXP Semiconductors
 Renesas Electronics
 STMicroelectronics
 Texas Instruments

5. PIC architecture
 RISC instruction set
 PIC – Programmable Interface Controller ??
Peripheral Interface Controller ??
Programmable Interface Controller ??

6. Microchip Microcontroller variants
 8-bit MCUs
 PIC10, PIC12 - 12 bit wide code memory/instruction
 PIC16 - 14 bit wide code memory/instruction
 PIC18 - 8 bit wide code memory / 16 bit instruction
 16-bit MCUs –
 PIC24 -12 bit wide code memory / 24 bit instructions
 dsPIC - 12 bit wide code memory / 24 bit instructions
 32-bit MCUs - PIC32MX, PIC32MZ
 32 bit instruction set
 16 bit instruction set for compact code

7. Problem
Design a circuit to turn on LED
when voltage is less than 3 V or
greater than 4 V

8. ADC(Analog to Digital Converter)
 ADC converts physical quanity(usually voltage) to a
digital number.
(for n-bit ADC)
 n-bit ADC can produce value in the range 0 to 2n
Analog Digital
input output
Range: Vref- to Vref+ Range: 0 to 2n
ADC

9. For example , a 8 bit ADC has +ve voltage reference of 5
V and –ve voltage reference of 0V. What is ADC value
for 2.5 V ?

10. PIC12F683

11.  PIC12F683 has 10 bit Successive Approximation ADC.
 Default reference voltages are
 For 3 V , ADC value 
 For 4 V , ADC value 

12. PIC 12F683 registers
 ANSEL – Configure pins as digital/analog and
A/D conversion clock select
 ADCON0 – Channel , Reference voltage select,etc.,
 ADRESH
 ADRESL ADC Result registers

13. ANSEL

14. ADCON0

15. ADRESH & ADRESL Registers
Left justified result

16. Right justified result