How to define OSC for vlaues below 1mhz? so you get the timing correct.

[ofuzzy1]

Define OSC ??

I like to run stuff at the slowest possible speed, to save battery power.
-- most of the time accuracy is not important.

32khz is not defined.

So I use the shift:

running on a 12f683 :D
 
'low speed osccon 31khz 
'bit 6-4 IRCF<2:0>: Internal Oscillator Frequency Select bits
'                               correction 
'                               by shifting
'                                   |
'                                   v
'       111 =8MHz
'       110 =4MHz (default)         0
'       101 =2MHz                   1   2
'       100 =1MHz                   2   4
'       011 =500kHz                 3   8
'       010 =250kHz                 4   16
'       001 =125kHz                 5   32
'       000 =31kHz (LFINTOSC)       7   128
 
        OSCCON.6 = 0
        OSCCON.5 = 0
        OSCCON.4 = 0
speed_shift  con   7   '  use 0-7 : oscillator / delay correction by shifting
 
...
 
Sub-rountines
 
X = Word, in milliSeconds, 
 
Be careful of the bits you have leftover is speed_shift =7 then the smallest number is 128 [2^7]
 
' Speed affected by the CPU clock speed
Lamp_ON:
    TRISIO = ALL_INPUTS - led
    GPIO =   led
    Pause X >> speed_shift ' Delay for on time in milliseconds
    TRISIO = ALL_INPUTS    ' Set to all inputs to save power
Return
 
OFF_Lamp:
    TRISIO = ALL_INPUTS 
    Pause X >> speed_shift ' Delay for on time in milliseconds
Return

[shahidali55]

Not possible.
Just define OSC as 4 or something and use 32Khz crystal with LP OSC fuse (internal RC osc can also be used).
Everything will run much S-L-O-W. Like 122.0703125 times slower if OSC is defined as 4Mhz and 32Khz crystal is used.
But this way all the time related statements like PAUSE will be thrown off.