米6体育平台手机版

SLAZ283AA October 2012 – May 2021 MSP430F5435

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6.16 CPU25

CPU Module

Function

DMA transfer does not execute during low power mode

Description

If the following instruction sequence is used ([] denotes an addressing mode) to enter a
low-power mode, and the DMARMWDIS bit is set, then DMA transfers are blocked for
the duration of the low-power mode.

BIS [register|index|absolute|symbolic],SR
CALLA [register]

Workaround

1. Insert a NOP instruction or __no_operation() intrinsic function call between the BIS and CALLA instructions

OR

2. Temporarily clear the DMARMWDIS bit when entering low power mode

Refer to the table below for compiler-specific fix implementation information.

IDE/Compiler	Version Number	Notes
IAR Embedded Workbench	IAR EW430 v6.20 until v6.40	User is required to add the compiler or assembler flag option below. --hw_workaround=nop_after_lpm
IAR Embedded Workbench	IAR EW430 v6.40 or later	Workaround is automatically enabled
TI MSP430 Compiler Tools (Code Composer Studio)	v4.1.3 or later
MSP430 GNU Compiler (MSP430-GCC)	MSP430-GCC 4.9 build 167

6.16 CPU25

Category

Function

Description

Workaround