Trouble setting 16F1939 to 32mhz with intosc. (PLL X4 not working)

[CuriousOne]

Hello.
This is my config:

'****************************************************************
;----[16F1937 Hardware Configuration]-------------------------------------------
#IF __PROCESSOR__ = "16F1939"
  #DEFINE MCU_FOUND 1
#CONFIG
cfg1 = _FOSC_INTOSC           ; INTOSC oscillator: I/O function on CLKIN pin
cfg1&= _WDTE_OFF              ; WDT disabled
cfg1&= _PWRTE_OFF             ; PWRT disabled
cfg1&= _MCLRE_OFF             ; MCLR/VPP pin function is digital input
cfg1&= _CP_ON                 ; Program memory code protection is enabled
cfg1&= _CPD_OFF               ; Data memory code protection is disabled
cfg1&= _BOREN_OFF             ; Brown-out Reset disabled
cfg1&= _CLKOUTEN_OFF          ; CLKOUT function is disabled. I/O or oscillator function on the CLKOUT pin
cfg1&= _IESO_ON               ; Internal/External Switchover mode is enabled
cfg1&= _FCMEN_ON              ; Fail-Safe Clock Monitor is enabled
  __CONFIG _CONFIG1, cfg1


cfg2 = _WRT_OFF               ; Write protection off
cfg2&= _VCAPEN_OFF            ; All VCAP pin functionality is disabled
cfg2&= _PLLEN_ON             ; 4x PLL enabled
cfg2&= _STVREN_ON             ; Stack Overflow or Underflow will cause a Reset
cfg2&= _BORV_19               ; Brown-out Reset Voltage (Vbor), low trip point selected.
cfg2&= _LVP_OFF               ; High-voltage on MCLR/VPP must be used for programming
  __CONFIG _CONFIG2, cfg2


#ENDCONFIG


#ENDIF


;----[Verify Configs have been specified for Selected Processor]----------------
;       Note: Only include this routine once, after all #CONFIG blocks
#IFNDEF MCU_FOUND
  #ERROR "No CONFIGs found for [" + __PROCESSOR__ +"]"
#ENDIF


'nixie led clock electronics direct drive


DEFINE ADC_BITS 10       ' Set number of bits in result
DEFINE ADC_CLOCK 3     ' Set clock source (rc = 3)
DEFINE ADC_SAMPLEUS 50 ' Set sampling time in microseconds 


 
ADCON1=%11110011 'enable adc internal reference and justify
FVRCON=%11001111   'set internal reference to 4.096V
OSCCON=%11110001  'SET INTOSC TO 8MHZ and enable 4X PLL
ANSELE=%00000001 'enable adc input porte.0
ANSELA=%00000000 'disable ADC on A
ANSELB=%00000000 'disable ADC on B
ANSELD=%00000000 'disable ADC on D
TRISC=%00000000 'set PORTC as output all
TRISD=%00000000 'set PORTD as output all
TRISB=%00000000 'set PORTB as output all
TRISA=%00000000 'set PORTA 2 as input, others as output
TRISE=%00000001  'set PORTE as output all except 0
WPUB=%00000000 'DISABLE B PULL UPS
OPTION_REG=%100000000  'disable other pull ups
LCDCON=%00000000  'disable LCD controller pins
LCDSE0=%00000000
LCDSE1=%00000000
LCDSE2=%00000000


DEFINE OSC 32 'set oscillator speed

It should run on 32mhz (8mhz clock * 4x PLL). However, it runs on 8mhz. If I set it to 16mhz, it works fine on 16mhz. So I guess, somehow, PLL setting is ignored. What I'm doing wrong?

I tried to play with PLL registers, but no luck...

[richard]

If PLLEN in Configuration Words = 1, SPLLEN bit is ignored. 4x PLL is always enabled (subject to oscillator requirements)

why are selecting Timer1 oscillator for fosc ? its incapable of 32mhz operation or pll

[CuriousOne]

Thanks!
Yes it was my error - set OSCCON=%11110000 and now it seems to be working correctly.