SAM4CP [DATASHEET]
43051E–ATPL–08/14
24
5.5.4
Low-power Mode Summary Table
The modes detailed above are the main low-power modes.
Table 5-2
below provides a configuration summary of the low-
power modes.
Notes: 1.
Refer to the note in
Section 5.5 “Low-power Modes”
.
When considering wake-up time, the time required to start the PLL is not taken into account. Once started, the
device works either from the 4, 8 or 12 MHz fast RC oscillator. The user has to add the PLL start-up time if it is
needed in the system. The wake-up time is defined as the time taken for wake-up until the first instruction is fetched.
Refer to
Table 3-1, “Signal Description List”
. Some anti-tamper pin pads are VDDIO powered.
See PIO Controller Multiplexing tables in
Section 11.4 “Peripheral Signal Multiplexing on I/O Lines”
.
Refer to the section Electrical Characteristics.
Fast RC Oscillator set to 4 MHz Frequency.
LCD voltage regulator can be OFF if VDDLCD is supplied externally thus saving current consumption of the LCD
voltage regulator.
In this mode, the core is supplied and not clocked but some peripherals can be clocked.
Depends on MCK frequency.
2.
3.
4.
5.
6.
7.
8.
9.
Table 5-2.
Low-power Mode Configuration Summary
Mode
SUPC,
32 kHz
Oscillator,
RTC, RTT
Backup
Registers,
POR
(Backup
Region)
Core
Regulator
/
LCD
Regulator
Core 0/1
Memory
Peripherals
Mode Entry
(1)
Potential
Wake-up Sources
Core
at
Wake-up
PIO State
in Low-
power
Mode
PIO State
at
Wake-up
Current
Consumption
Wake-up
Time
Backup
Mode
ON
OFF/OFF
OFF / OFF
(Not powered)
VROFF bit = 1
or
SLEEPDEEP = 1
+ WFE
- FWUP pin
- WKUP0-15 pins
(3)
- Supply Monitor
- Anti-tamper inputs
(3)
- RTC or RTT alarm
Reset
Previous
(4)
(5)
< 1,5 ms
Backup
Mode with
LCD
ON
OFF/ON
OFF / OFF
(Not powered)
VROFF bit = 1
or
SLEEPDEEP = 1
+ WFE
- FWUP pin
- WKUP0-15 pins
(3)
- Supply Monitor
- Anti-Tamper inputs
(3)
- RTC or RTT alarm
Reset
Previous
state saved
Unchanged
(LCD Pins)/
Inputs with
pull ups
< 1,5 ms
Wait Mode
Flash in
Standby
Mode
ON
ON/
(7)
Core 0 and 1,
memories and
peripherals:
Powered, but
Not clocked
WAITMODE = 1 +
FLPM = 0
or
SLEEPDEEP = 0
+ LPM = 1
+ FLPM = 0
+ WFE
Any Event from:
- Fast start-up through
WKUP0-15 pins
- Anti-Tamper inputs
(3)
- RTC or RTT alarm
Clocked
back
Previous
< 10
μ
s
Wait Mode
Flash in
Deep
Power-
down
Mode
(6)
ON
ON/
(7)
Core 0 and 1,
memories and
peripherals:
Powered, but
Not clocked
WAITMODE = 1 +
FLPM = 1
or
SLEEPDEEP = 0
+ LPM = 1
+ FLPM = 1
+ WFE
Any Event from:
- Fast start-up through
WKUP0-15 pins
- Anti-Tamper inputs
(3)
- RTC or RTT alarm
Clocked
back
Previous
< 75
μ
s
Sleep
Mode
ON
ON/
(7)
Core 0 and/or
Core 1:
Powered
(Not clocked)
(8)
SLEEPDEEP = 0
+ LPM = 0
+ WFE or WFI
Entry mode = WFI
Any Enabled Interrupts;
Entry mode = WFE
Any Enabled Events:
- Fast start-up through
WKUP0-15 pins
- Anti-Tamper inputs
(3)
- RTC or RTT alarm
Clocked
back
Previous
(9)
(9)