ATSAMA5D41A-CU 데이터 시트보기 (PDF) - Atmel Corporation

부품명

상세내역

제조사

ATSAMA5D41A-CU

SMART ARM-based Embedded MPU

Atmel Corporation 

4.2 Powerup Considerations

VDDBU must be set first and for a permanent duration.

The user must maintain NRST at ‘L’ prior to switching on the power supplies. Then VDDIOP and VDDANA are to

be switched on, followed by VDDCORE. Afterward, other power supplies can be switched on. After a delay of five

SLCK periods, the user can assert NRST to ‘H’ and make the system start.

Figure 4-1 illustrates the SAMA5D4 powerup sequence.

Figure 4-1. Recommended Powerup Sequence

VDDBU

VDDIOP0

VDDIOP1

VDDANA

VDDCORE

VDDOSC

VDDIOM

VDDUTMII

VDDIODDR

VDDFUSE

NRST

5 x tSLCK

time

4.3 Shut-down Considerations

When the SHDN pin is asserted, NRST must be maintained at ‘L’ prior to switching off the power supplies. After a

delay of five SLCK periods, VDDPLL, then VDDCORE, then VDDIOP and VDDANA can be switched off.

Afterward, other power supplies can be switched off.

VDDBU must never be switched off when other supplies are on.

4.4 Wakeup Considerations

When SHDN is rising, NRST is to be maintained at ‘L’ prior to switching on the power supplies. Then VDDIOP and

VDDANA are to be switched on, followed by VDDCORE and VDDPLL. Afterward, other power supplies can be

switched on. After a delay of five SLCK periods, the user can assert NRST to ‘H’ and make the system wakeup.

SAMA5D4 Series [DATASHEET]

29

Atmel-11238C-ATARM-SAMA5D4-Datasheet_12-Jul-16

Share Link: