Hi,
I have a design based on a CY8C3865LTI-014.
I noticed that in reality the sleep current was much too high than anticipated (more than 25µA higher).
The steps I took to debug this were:
- remove all components but the PSOC and the surrounding caps from the PCB
- build a fresh project without components, and only this code:
```
int main(void)
{
CyGlobalIntEnable; /* Enable global interrupts. */
// set 32kHz crystal to operate in low power mode when in sleep
CyXTAL_32KHZ_SetPowerMode(1);
//start WDT
CyWdtStart(CYWDT_1024_TICKS,CYWDT_LPMODE_DISABLED);
/* Place your initialization/startup code here (e.g. MyInst_Start()) */
CyPmSaveClocks();
for(;;)
{
/* Place your application code here. */
// clear wdt
CyWdtClear();
// sleep 1 s
CyPmSleep(PM_SLEEP_TIME_ONE_PPS,PM_SLEEP_SRC_NONE);
CyPmReadStatus(CY_PM_ONEPPS_INT);
}
CyPmRestoreClocks();
}
```
As one can see, after initialisation, the PSOC goes in sleep mode forever.
When measuring the current, I still measure ~28µA, which is much more than the specified 1µA in the datasheet.
What could be the cause of this high sleep current?
I attached the project for you reference.
