ADV
ANCEINFORMA
TION
TMS320F28377S, TMS320F28376S, TMS320F28375S, TMS320F28374S
SPRS881A – AUGUST 2014 – REVISED JUNE 2015
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.
describes the effect on the system when any of the clock-gating low-power modes are entered.
Table 5-26. Effect of Clock-Gating Low-Power Modes on the Device
MODULES/
CPU1 IDLE
CPU1 STANDBY
HALT
CLOCK DOMAIN
CPU1.CLKIN
Active
Gated
Gated
CPU1.SYSCLK
Active
Gated
Gated
CPU1.CPUCLK
Gated
Gated
Gated
Clock to modules Connected to
Active
Gated
Gated
PERx.SYSCLK
WD1CLK
Active
Active
Gated if CLKSRCCTL1.WDHALTI = 0
WD2CLK
Active
Active
Gated
AUXPLLCLK
Active
Active
Gated
PLL
Powered
Powered
Powered-Down
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 OSC
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.
describes
the effects on the system when the HIBERNATE mode is entered.
Table 5-27. 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
Enters Low-Power Mode
peripherals, Flash
74
Specifications
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