CCS/MSP430FR2311: MSP430FR2311

vadim piskun

Expert 2220 points

Part Number: MSP430FR2311
Other Parts Discussed in Thread: ENERGYTRACE, MSP-TS430PW20, MSP-FET

Tool/software: Code Composer Studio

I measure the following currents with EnergyTrace

LPM3: free run 16 uA; debug 35 uA

LPM4: free run 0 uA; debug 18 uA

I use this code

#include <msp430.h>

int main(void)
{
WDTCTL = WDTPW | WDTHOLD; // Stop WDT
// Configure GPIO
P1DIR = 0xFF; P2DIR = 0xFF;
P1REN = 0xFF; P2REN = 0xFF;
P1OUT = 0x00; P2OUT = 0x00;
PM5CTL0 &= ~LOCKLPM5;
__bis_SR_register(LPM3_bits); // Enter LPMx
__no_operation(); // For debug
}

I use MSP-FET probe with MSP-TS430PW20 board

The data sheet says 1.16uA and 0.6uA for those modes.

thanks vadim

over 3 years ago

0 Bruce McKenney47378 over 3 years ago

Guru 89950 points

If by "Debug" you mean "not Free Run", I think that mode isn't recommended for EnergyTrace since the results are misleading.

The 16uA in LPM3 is almost all the REFO, supplying ACLK. The current for the REFO is given in table 5-7.

In data sheet (SLASE58E) Sec 5.7 they don't have a case for ACLK=REFO. Note (5) says ACLK is running from the LFXT. Unfortunately, you can't set ACLK=VLOCLK on the FR2311.

[Edit: Fixed typo]

0 vadim piskun over 3 years ago in reply to Bruce McKenney47378

Expert 2220 points

– Active mode: 126 μA/MHz
– Standby: real-time clock (RTC) counter (LPM3.5
with 32768-Hz crystal): 0.71 μA
– Shutdown (LPM4.5): 32 nA without SVS

Hi Bruce,

This is from the data sheet. Does it mean that I can set it with external crystal into this power consumption .71uA

thanks vadim

0 Bruce McKenney47378 over 3 years ago in reply to vadim piskun

Guru 89950 points

I expect so. Keep in mind that LPM3.5 works somewhat differently from LPM3/4. Example msp430fr231x_lpm3_5_01.c demonstrates:

https://dev.ti.com/tirex/explore/node?node=AA90Hg5bjAQhib3FeNhDPA__IOGqZri__LATEST

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CCS/MSP430FR2311: MSP430FR2311