Техническая Спецификация для Atmel SAM4S-XPLD Atmel ATSAM4S-XPLD ATSAM4S-XPLD
Модели
ATSAM4S-XPLD
462
SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
Important: Prior to instructing the system to enter the Wait Mode, the internal sources of wake-up
must be cleared. It must be verified that none of the enabled external wake-up inputs (WKUP) hold an
active polarity.
must be cleared. It must be verified that none of the enabled external wake-up inputs (WKUP) hold an
active polarity.
A Fast Start-up is enabled upon the detection of a programmed level on one of the 16 wake-up inputs
(WKUP) or upon an active alarm from the RTC, RTT and USB Controller. The polarity of the 16
wake-up inputs is programmable by writing the PMC Fast Start-up Polarity Register (PMC_FSPR).
(WKUP) or upon an active alarm from the RTC, RTT and USB Controller. The polarity of the 16
wake-up inputs is programmable by writing the PMC Fast Start-up Polarity Register (PMC_FSPR).
The Fast Restart circuitry, as shown in
signal to the Power Management Controller. As soon as the fast start-up signal is asserted, the
embedded 12/8/4 MHz Fast RC Oscillator restarts automatically.
embedded 12/8/4 MHz Fast RC Oscillator restarts automatically.
When entering the Wait Mode, the embedded flash can be placed in low power mode depending on
the configuration of the FLPM in PMC_FSMR register. This bitfield can be programmed anytime and
will be taken into account at the next time the system enters Wait Mode.
the configuration of the FLPM in PMC_FSMR register. This bitfield can be programmed anytime and
will be taken into account at the next time the system enters Wait Mode.
The power consumption reduction is optimal when configuring 1 (deep power down mode) in FLPM. If
0 is programmed (standby mode), the power consumption is slightly higher as compared to the deep
power down mode.
0 is programmed (standby mode), the power consumption is slightly higher as compared to the deep
power down mode.
When programming 2 in FLPM, the Wait Mode flash power consumption is equivalent to the active
mode when there is no read access on the flash.
mode when there is no read access on the flash.
Figure 28-8. Fast Start-up Circuitry
Each wake-up input pin and alarm can be enabled to generate a Fast Start-up event by writing 1 to
the corresponding bit in the Fast Start-up Mode Register (PMC_FSMR).
the corresponding bit in the Fast Start-up Mode Register (PMC_FSMR).
fast_restart
WKUP15
FSTT15
FSTP15
WKUP1
FSTT1
FSTP1
WKUP0
FSTT0
FSTP0
RTTAL
RTCAL
USBAL
RTT Alarm
RTC Alarm
USB Alarm