PIC16F684 → PIC16F616/HV616 Migration DEVICE MIGRATIONS This document is intended to describe the functional differences that are present when migrating from the PIC16F684 to the PIC16F616. Note: The PIC16F616 is not a revision of the PIC16F684, but a new device. As a result, the performance characteristics may be different and designers are recommended to consult the electrical characteristics in the PIC16F616 data sheet. INTRODUCTION The new PIC16F616 device offers a migration path from the PIC16F684 for designs requiring increased peripheral options and higher operating voltage. This migration document will identify, explain these differences and how they could affect a system design, and identify sources of further information. Note: TABLE 1: The user should verify that any external crystal or ceramic resonator oscillator circuit starts and performs as expected. Adjustment of the loading capacitor values and/or the Oscillator mode may be required. MIGRATION ISSUES No. Description H/W S/W Data Sheet Section 1 Data EEPROM No internal data EEPROM in the PIC16F616. Thus, no EEIF bit in PIR1 register, no EEDAT, EEADR, EECON1 and EECON2 registers. ✔ — N/A 2 Internal Oscillator Internal oscillator frequency set as 4 or 8 MHz in the Configuration Word. There is no OSCCON register in the PIC16F616 and the internal oscillator frequency cannot be selected in software. ✔ ✔ 3.0 12.1 3 Internal/External Oscillator Switch-Over The PIC16F616 does not support run time switching between oscillator sources. ✔ ✔ N/A 4 Watchdog Timer No 16-bit Watchdog Timer prescaler or associated WDTCON register. — ✔ N/A 5 Ultra Low-power Wake-up No Ultra low-power wake-up feature and associated enable bit, ULWUE, in the PCON register. ✔ — N/A 6 Brown-out Reset No software controlled Brown-out Reset. ✔ ✔ N/A 7 Comparator Configuration The input multiplexing of the comparators has changed. There are now 3 registers (CM1CON0, CM2CON0, CM2CON1) which control comparator operation. — ✔ 8.0 8 Fail-Safe Clock Monitor The PIC16F616 does not have a fail-safe clock monitor ✔ ✔ N/A Legend: H/W – issues may exist with regard to the application circuit. S/W – issues may exist with regard to the user program. Data Sheet Section – section of the PIC16F616 data sheet detailing this feature. © 2007 Microchip Technology Inc. DS41314A-page 1 TABLE 2: NEW FEATURES No. Data Sheet Section Feature 1 Fixed voltage reference for comparator. A 0.6V nominal internal voltage reference can selectively be connected to the positive input of either comparator. 8.1 2 Fixed voltage references to the ADC References of 0.6V and 1.2V, nominal are available as conversion sources. Conversion of these references allows VDD to the device to be calculated. 9.0 3 SR Latch integrated with the comparator. 8.10 4 Each comparator has selectable built-in comparator hysteresis. 8.9 5 Built-in shunt regulator in the PIC16HV616 allows the device to operate at higher voltages when used with the correct value series resistor. 11.0 6 Timer1 FOSC mode Timer1 has the option to increment at the device FOSC, controlled by the T1ACS bit, which gives increased resolution of signals measured using the Timer1 gate feature. 6.2 Legend: Data Sheet Section – section of the PIC16F616 data sheet detailing this feature. DS41314A-page 2 © 2007 Microchip Technology Inc. Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. • Microchip is willing to work with the customer who is concerned about the integrity of their code. • Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.” Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, KEELOQ, KEELOQ logo, microID, MPLAB, PIC, PICmicro, PICSTART, PRO MATE, PowerSmart, rfPIC, and SmartShunt are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. AmpLab, FilterLab, Linear Active Thermistor, Migratable Memory, MXDEV, MXLAB, PS logo, SEEVAL, SmartSensor and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. Analog-for-the-Digital Age, Application Maestro, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, PICkit, PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2007, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona, Gresham, Oregon and Mountain View, California. The Company’s quality system processes and procedures are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified. © 2007 Microchip Technology Inc. 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