12F683 EXTERNAL CRYSTAL CONFIG for DTMFOUT statement

Hello,
I currently using a 12F683 at 8mhz internal osc, with this code below and it's working fine no problem at all.

#CONFIG
; __config _INTRC_OSC_NOCLKOUT & _WDTE_ON & _PWRTE_ON & _MCLRE_OFF & _BOD_OFF & _CP_ON & _CPD_OFF
#ENDCONFIG

OSCCON = $70 ; 8mhz

This is the config set from meConfig setup program:

#CONFIG
__config _INTOSC & _WDT_ON & _PWRTE_OFF & _MCLRE_OFF & _CP_OFF & _CPD_OFF & _BOD_ON & _IESO_ON & _FCMEN_ON
#ENDCONFIG


Now I need to use the same 12F683 chip with an 16mhz and/or 20mhz external crystal,

What do I need to change to make it work at 16 or 20mhz external crystal, please provide both config 16 and 20mhz crystal.

Thank's to reply.

At the top Define 16mhz or 20mhz

OSCCON = 0

In the config replace

_INTOSC or _INTRC_OSC_NOCLKOUT with _HS_OSC

Thank's Mark_s for the quick reply,

I did changed theses lines, but there's one thing is odd, I have to turn MCLRE_ON to "on" if it's "OFF" nothing is working properly
look at my listing, I did this to test if the Pic is running at 16mhz,

Cheer,


#CONFIG
__config _HS_OSC & _WDT_ON & _PWRTE_OFF & _MCLRE_ON & _CP_OFF & _CPD_OFF & _BOD_ON & _IESO_ON & _FCMEN_ON
#ENDCONFIG

OSCCON = 0
DEFINE OSC 4 ;RUN 4X 16MHZ CRYSTAL
;DEFINE OSC 16 ;RUN 1X 16MHZ CRYSTAL PAUSE 1000 = 1 SEC

ANSEL = 0 ; Set all digital PULLUP Resistor page:10
CMCON0 = 7 ; Analog comparators off

LED Con 0

DO ; main loop
TOGGLE LED
PAUSE 1000
LOOP
END

Quote:

---

Originally Posted by jackberg1

Thank's Mark_s for the quick reply,

I did changed theses lines, but there's one thing is odd, I have to turn MCLRE_ON to "on" if it's "OFF" nothing is working properly
look at my listing, I did this to test if the Pic is running at 16mhz,

Cheer,


#CONFIG
__config _HS_OSC & _WDT_ON & _PWRTE_OFF & _MCLRE_ON & _CP_OFF & _CPD_OFF & _BOD_ON & _IESO_ON & _FCMEN_ON
#ENDCONFIG

OSCCON = 0
DEFINE OSC 4 ;RUN 4X 16MHZ CRYSTAL
;DEFINE OSC 16 ;RUN 1X 16MHZ CRYSTAL PAUSE 1000 = 1 SEC

ANSEL = 0 ; Set all digital PULLUP Resistor page:10
CMCON0 = 7 ; Analog comparators off

LED Con 0

DO ; main loop
TOGGLE LED
PAUSE 1000
LOOP
END

---

----------------------------------------------- NEW CONFIG SEEM TO WORK ----------------------------------------------

IF DEFINE OSC 4 LED BLINK 2 times on-off / 1 sec FOR 16MHZ CRYSTAL
IF DEFINE OSC 8 LED BLINK 1 times on-off / 1 sec FOR 16MHZ CRYSTAL
IF DEFINE OSC 16 LED BLINK ON 1 SEC, BLINK OFF 1 SEC, FOR 16MHZ CRYSTAL

Let me know if this new config is correct.

Thank's again for comments.


; config setup from meConfig program
#CONFIG
__config _HS_OSC & _WDT_OFF & _PWRTE_OFF & _MCLRE_OFF & _CP_ON & _CPD_OFF & _BOD_OFF & _IESO_OFF & _FCMEN_OFF
#ENDCONFIG


;OSCCON = 0
;DEFINE OSC 4 ;RUN 4X 16MHZ CRYSTAL
;DEFINE OSC 8 ;RUN 2X 16MHZ CRYSTAL
DEFINE OSC 16 ;RUN 1X 16MHZ CRYSTAL PAUSE 1000 = 1 SEC


ANSEL = 0 ; Set all digital PULLUP Resistor page:10
CMCON0 = 7 ; Analog comparators off


LED Con 0


DO ; main loop
TOGGLE LED
PAUSE 1000
LOOP
END