sleep problem help plz >>>.

[mehmetOzdemir]

sorry i did mistikes , all wat i need is to put pic in sleep mode but very low current like datasheet says 2 uA im gettin 3 mA when it sleeps . plz help

is there any voltage regulator on your board.(7805 - 78l05)

measure only the current off pic.

[Mus.me]

is there any voltage regulator on your board.(7805 - 78l05)

measure only the current off pic.

hi mehmetOzdemir , no im useing 3.7 battery i just think the problem in the code i dont know how to desables everythings during sleep mode. help plz

[Darrel Taylor]

DEFINE CONFIG_WORD_$3F31 
DEFINE INT_OSC 8

Are you putting those in there for some other purpose?

They have no effect on your PIC.
Including setting the proper configs and OSC.
<br>

[Mus.me]

DEFINE CONFIG_WORD_$3F31 
DEFINE INT_OSC 8

Are you putting those in there for some other purpose?

They have no effect on your PIC.
Including setting the proper configs and OSC.
<br>

thanks DT ive took them off but still the same problem

[Darrel Taylor]

thanks DT ive took them off but still the same problem

And what did you replace them with?
<br>

[Mus.me]

And what did you replace them with?
<br>

well config words is $3F31 wdte off i did sett them in the programmer loader
im sure i didnt disable somethings like comparators or registers or acd im new in pbp ,i dont understand to much the datasheet . and using internal osc .tank DT for reply ..

[BrianT]

You don't tell us what your hardware configuration is. You do not appear to be setting TRIS for ports A, C and E. They will probably have defaulted to inputs and if any are floating they can be in an undefined state and drawing high current. Make sure all unused inputs are tied high or low and are not allowed to float some mid voltage where the CMOS inputs draw high current.

Better to make all unused pins outputs and force them high or low as appropriate for your hardware.

Also, when the system goes to sleep, the high/low status of any outputs are preserved. You might find the processor is asleep but a pin is high and sourcing current to a load like your buzzer. Piezo buzzers can have high leakage. Equally the pin might be low and sinking current from the supply. Use a voltmeter and check that all i/o pins are doing exactly what you want. The WatchDog, brownout and other timers and peripherals all draw additional current and the datasheet gives the most favourable sleep current with all these devices turned off.

I find it helpful to explicitly define every hardware pin on all ports, whether used or not, with something like

'PortA
AccelY      var porta.0    ' accelerometer Y axis
AccelX      var porta.1    ' accelerometer X axis
ECG         var porta.2    ' analog heart input
MemD        var porta.3    ' M25Pxx Data TO memchip
MemClk      var porta.4    ' M25Pxx clock
LED         var porta.5    ' Active HIGH  
SpareA6     var porta.6    '
SpareA7     var porta.7    '
TRISA = %00001111          ' lowest power
PORTA = %00000000          ' lowest power

PBP assumes the WatchDog prescaler is set to 512. SLEEP xx is only accurate if the WDTPS is 512. SLEEP causes a fairly high current spike each time the chip wakes up, approximately once per second. If you set the WDTPS to something like 2048 the sleep times are off by a factor of 4 but the wakeup current spike is reduced in frequency by a factor of 4 as well.

Getting down to lowest power is hard and needs a sensitive microammeter in my experience. I have spent months getting to minimum current on a data logger and have now got a system down below 500 nA with a PIC18F4620 at 3.7 volts. That includes 256 Mbits of memory and all peripherals.

HTH
BrianT