PIC16F684-PIC16F616/HV616 Migration

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
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•
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© 2007 Microchip Technology Inc.
DS41314A-page 3
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DS41314A-page 4
© 2007 Microchip Technology Inc.