Datasheet

TMS320F28379S

TMS320F28377S

TMS320F28376S, TMS320F28375S, TMS320F28374S

SPRS881C –AUGUST 2014–REVISED MAY 2016

www.ti.com

Submit Documentation Feedback

Product Folder Links: TMS320F28379S TMS320F28377S TMS320F28376S TMS320F28375S TMS320F28374S

5.7.8 Low-Power Modes

This device has three clock-gating low-power modes and a special power-gating mode.

Further details, as well as the entry and exit procedure, for all of the low-power modes can be found in the

Low Power Modes section of the TMS320F2837xS Delfino Microcontrollers Technical Reference Manual.

5.7.8.1 Clock-Gating Low-Power Modes

IDLE, STANDBY, and HALT modes on this device are similar to those on other C28x devices. Table 5-29

describes the effect on the system when any of the clock-gating low-power modes are entered.

Table 5-29. Effect of Clock-Gating Low-Power Modes on the Device

MODULES/

CLOCK DOMAIN

CPU1 IDLE CPU1 STANDBY HALT

CPU1.CLKIN Active Gated Gated

CPU1.SYSCLK Active Gated Gated

CPU1.CPUCLK Gated Gated Gated

Clock to modules Connected to

PERx.SYSCLK

Active Gated Gated

CPU1.WDCLK Active Active Gated if CLKSRCCTL1.WDHALTI = 0

AUXPLLCLK Active Active Gated

PLL Powered Powered Software must power down PLL before

entering HALT

INTOSC1 Powered Powered Powered down if CLKSRCCTL1.WDHALTI = 0

INTOSC2 Powered Powered Powered down if CLKSRCCTL1.WDHALTI = 0

Flash Powered Powered Software-Controlled

X1/X2 Crystal Oscillator Powered Powered Powered-Down

5.7.8.2 Power-Gating Low-Power Modes

HIBERNATE mode is the lowest power mode on this device. It is a global low-power mode that gates the

supply voltages to most of the system. HIBERNATE is essentially a controlled power-down with remote

wakeup capability, and can be used to save power during long periods of inactivity. Table 5-30 describes

the effects on the system when the HIBERNATE mode is entered.

Table 5-30. Effect of Power-Gating Low-Power Mode on the Device

MODULES/POWER DOMAINS HIBERNATE

M0 and M1 memories ● Remain on with memory retention if LPMCR.M0M1MODE = 0x00

● Are off when LPMCR.M0M1MODE = 0x01

CPU1 digital peripherals Powered down

Dx, LSx, GSx memories Power down, memory contents are lost

IOs On with output state preserved

Oscillators, PLL, analog

peripherals, Flash

Enters Low-Power Mode