This document intended describe functional differences electrical spec

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PIC16C622A PIC16F628 Migration
This document intended describe functional differences electrical specification differences that present when migrating from device next. Table shows considerations that must taken into account when migrating from PIC16C622A PIC16F628. Table shows electrical timing differences.
This device been designed perform parameters data sheet. been tested electrical specification designed determine conformance with these parameters. process differences manufacture this device, this device have different performance characteristics than earlier version. These differences cause this device perform differently your application than earlier version this device.
user should verify that device oscillator starts performs expected. Adjusting loading capacitor values and/or Oscillator mode required.
TABLE
Module Oscillator Oscillator Oscillator Oscillator USART MCLR Memory Memory Legend:
PIC16C622A PIC16F628 FUNCTIONAL DIFFERENCES
Differences from PIC16C622A mode Dual Speed mode mode IntRC mode 9-bit USART MCLR Disable EEPROM Data Memory Issues exist with regard application circuit. Issues exist with regard user program. Prog. Issues exist with regard programming. Prog.
Programming Voltage Programming mode
2002 Microchip Technology Inc.
DS30610C-page
OSCILLATOR MODULE
Mode
PIC16F628 supports External Resistor Oscillator mode. This mode differs from traditional Oscillator mode that only resistor bias current required. Designers should verify their oscillator design suitability application before use. Oscillator mode also supports Dual Speed mode.
clock directly PIC16F628 core. There gain stage in-line. Designers should verify their oscillator design suitability application before use.
IntRC Mode
PIC16F628 IntRC Oscillator mode supports Dual Speed mode also.
Dual Speed Mode
PIC16F628 supports Dual Speed mode when configured either IntRC modes. This sub-mode operation toggles between fixed frequency frequency either IntRC modes.
Mode
PIC16F628 supports External Clock-in mode. designed usage applications where system clock available. This mode provides
CONFIG Reg. bits FOSC<2:0>
Description mode w/clkout mode w/clkout mode clkout mode clkout IntRC w/clkout IntRC w/clkout IntRC clkout IntRC clkout
PCON Reg. OSCF
Result bias'ed speed bias'ed speed
USART MODULE
9-bit USART
PIC16F628 USART supports 9-bit mode. This mode useful multi-processor communications. When bits ADEN register RCSTA set, multi-processor communication enabled. used indicate whether address data being transmitted Master.
MEMORY ORGANIZATION MODULE
RAThe PIC16F628 bytes data while PIC16C622A bytes.
EEPROM Data
PIC16F628 bytes EEPROM data memory.
MCLR MODULE
MCLR disabled PIC16F628 disabled. enabled, then MCLR always enabled, regardless state MCLR disable fuse. When MCLR disabled, becomes input only pin. still applied this initiate programming. MCLR signals generated internally MCLR disabled.
PROGRAMMING MODULE
Voltage Programming Mode
PIC16F628 supports Voltage Programming mode. When configuration word asserted, placing RB4/PGM will instruct part enter Voltage Programming mode. Note While this mode, longer used general purpose pin. must 5.0V ±10% during erase/ program operations while Voltage Programming mode.
DS30610C-Page
2002 Microchip Technology Inc.
TABLE
Parm. D010
PIC16C622A PIC16F628 ELECTRICAL SPECIFICATION DIFFERENCES
PIC16C622A Data Sheet PIC16F628 Data Sheet FOSC MHz, 3.0V, Disabled, mode FOSC MHz, 3.0V, Disabled, mode 4.0V (125°) 4.0V 4.0V
Sym.
Characteristic
Units
Conditions
Supply Current (Note
D023
IWDT Current (Note ICOMP Comparator Current each Comparator (Note IVREF VREF Current (Note
Note
These parameters characterized tested. Data "Typ" column 5.0V, 25°C, unless otherwise stated. These parameters design guidance only tested. supply current mainly function operating voltage frequency. Other factors, such loading switching rate, oscillator type, internal code execution pattern, temperature, also have impact current consumption. test conditions measurements active operation mode are: OSC1 external square wave, from rail rail; pins tri-stated, pulled VDD, MCLR VDD; enabled/disabled specified. power-down current SLEEP mode does depend oscillator type. Power-down current measured with part SLEEP mode, with pins hi-impedance state tied VSS. current additional current consumed when this peripheral enabled. This current should added base measurement. Commercial temperature range only. Includes static current. Does include reads writes.
2002 Microchip Technology Inc.
DS30610C-page
TABLE
Parm. D010 D023
PIC16LC622A PIC16LF628 ELECTRICAL SPECIFICATION DIFFERENCES
PIC16LC622A Data Sheet PIC16LF628 Data Sheet FOSC MHz, 2.5V, Disabled, mode 3.0V 4.0V (125°) 3.0V 4.0V 3.0V 4.0V
Sym.
Characteristic
Units
Conditions
Supply Current (Note
IWDT Current (Note ICOMP Comparator Current each Comparator (Note IVREF VREF Current (Note
These parameters characterized tested. Data "Typ" column 5.0V, 25°C, unless otherwise stated. These parameters design guidance only tested. Note supply current mainly function operating voltage frequency. Other factors, such loading switching rate, oscillator type, internal code execution pattern, temperature, also have impact current consumption. test conditions measurements active operation mode are: OSC1 external square wave, from rail rail; pins tri-stated, pulled VDD, MCLR VDD; enabled/disabled specified. power-down current SLEEP mode does depend oscillator type. Power-down current measured with part SLEEP mode, with pins hi-impedance state tied VSS. current additional current consumed when this peripheral enabled. This current should added base measurement. Includes static current. Does include reads writes.
DS30610C-page
2002 Microchip Technology Inc.
Note following details code protection feature PICmicro® MCUs. PICmicro family meets specifications contained Microchip Data Sheet. Microchip believes that family PICmicro microcontrollers most secure products kind market today, when used intended manner under normal conditions. There dishonest possibly illegal methods used breach code protection feature. these methods, knowledge, require using PICmicro microcontroller manner outside operating specifications contained data sheet. person doing engaged theft intellectual property. Microchip willing work with customer concerned about integrity their code. Neither Microchip other semiconductor manufacturer guarantee security their code. Code protection does mean that guaranteeing product "unbreakable". Code protection constantly evolving. Microchip committed continuously improving code protection features product.
have further questions about this matter, please contact local sales office nearest you.
Information contained this publication regarding device applications like intended through suggestion only superseded updates. your responsibility ensure that your application meets with your specifications. representation warranty given liability assumed Microchip Technology Incorporated with respect accuracy such information, infringement patents other intellectual property rights arising from such otherwise. Microchip's products critical components life support systems authorized except with express written approval Microchip. licenses conveyed, implicitly otherwise, under intellectual property rights.
Trademarks Microchip name logo, Microchip logo, FilterLab, KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER, PICSTART, MATE, SEEVAL Embedded Control Solutions Company registered trademarks Microchip Technology Incorporated U.S.A. other countries. dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, microPort, Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, MXDEV, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode Total Endurance trademarks Microchip Technology Incorporated U.S.A. Serialized Quick Term Programming (SQTP) service mark Microchip Technology Incorporated U.S.A. other trademarks mentioned herein property their respective companies. 2002, Microchip Technology Incorporated, Printed U.S.A., Rights Reserved.
Printed recycled paper.
Microchip received QS-9000 quality system certification worldwide headquarters, design wafer fabrication facilities Chandler Tempe, Arizona July 1999. Company's quality system processes procedures QS-9000 compliant PICmicro® 8-bit MCUs, KEELOQ® code hopping devices, Serial EEPROMs microperipheral products. addition, Microchip's quality system design manufacture development systems 9001 certified.
2002 Microchip Technology Inc.
DS30610C page
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03/01/02
DS30610C-page
2002 Microchip Technology Inc.

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