PIC16C782 Microchip Technology Inc., PIC16C782 Datasheet - Page 113
PIC16C782
Manufacturer Part Number
PIC16C782
Description
8-bit Cmos Microcontrollers With A/d, D/a, Opamp, Comparators And Psmc
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16C782.pdf
(186 pages)
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EXAMPLE 13-2:
;*
;*
;*
;*
;*
;*
;*
;*
;*
;*
;*
;*
;********************************************
;*
;
;*******************************************************
;*
;*
;*******************************************************
;*
;*
;********************************************************
;*
;*
;*
;********************************************************
;*
;*
;*
2001 Microchip Technology Inc.
PSMC Initialization
This code block will configure the PSMC
and all additional peripherals for a buck
mode switching power supply.
Order of configuration
1.
2.
3.
4.
5.
6.
This code block will configure all analog ports.
BANKSEL
MOVLW
MOVWF
MOVLW
MOVWF
MOVLW
MOVWF
This code block will configure the DAC for VDD as
DACREF, and RB1/AN5/VDAC as an output.
BANKSEL
CLRF
MOVLW
MOVWF
MOVLW
MOVWF
This code block will configure the OPA module
as an Op Amp, with a 3 MHZ GBWP
MOVLW
MOVWF
This code block will configure Comparator C1
for normal speed and output polarity,
input on AN6, and Reference from the VREF1
MOVLW
MOVWF
This code block will configure the PSMC module
for PWM, Fosc/128, Single input, Single output
Non-inverting out, DC min = 0%, DC max = 50%
MOVLW
MOVWF
MOVLW
MOVWF
BSF
PORTA/B I/O and analog configured
DAC enabled, configured, and preset
Op Amp enabled and configured
Comparator C1 enabled and configured
PSMC configured
PSMC enabled
TRISA
B’00001011’
TRISA
B’11001110
TRISB
B’11101011’
ANSEL
EXAMPLE PSMC CONFIGURATION FOR A BUCK MODE SWITCHING POWER
SUPPLY
DACON0
DAC
B’11000000’
DACON0
OUTPUT_VALUE
DAC
B’10000001’
OPACON
B’10001010’
CM1CON0
B’0000000’
PSMCCON0
B’00000110’
PSMCCON1
PSMCCON1,SMCON
; Select Bank 1
; Set RA0,1,& 3 as inputs
; Set RB1,2,3,6 & 7 as inputs
; Set AN0,1,3,5,6 & 7 as analog
; Select Bank 2
; Set DAC to safe value
; Enable DAC, output
;
; Set dAC output level
; Set Op Amp mode and
;
; Set C1; no ext out, norm
;
; Set DCmin 0, DCmax 50, Fosc/128
; Set PWM, 1 in, 2 out, noninvert
; Enable PSMC
2 MHz GBWP
speed & pol, VREF1, AN6
and set DACREF = VDD
Preliminary
PIC16C781/782
DS41171A-page 111
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