Hi,
I have a little confusion about power consumption calculation of End Device which was made in SLAA378A.
It is written there that MSp430 consumes 900nA in low-power mode 3.
However, since source clock for timer is set in ED application like that:
BCSCTL3 |= LFXT1S_2; // LFXT1 = VLO TACCTL0 = CCIE; // TACCR0 interrupt enabled TACCR0 = 12000; // ~ 1 sec TACTL = TASSEL_1 + MC_1; // ACLK, upmode
In SLAS504B it is said that if i use low power low frequency VLO in LPM3 typical consumption is 600nA for 3V and temp 25C
So may question is if i could use that value (600nA) for my calculations of power consumption in sleeping routines of ED ?
Thanks,
Paul
yes, it's fair to assume that the MSP430F2274 in LPM3 using the VLO will consume 600nA given that it's speced in the datasheet. 900uA is the current consumption when using LFXT1 (ie an external 32kHz crystal). it looks like the app note is actually overestimating the current consumption.
adrian.