SPEAR320 datasheet(49/73 Pages) STMICROELECTRONICS

поискавой системы для электроныых деталей

SPEAR320 датащи(PDF) 49 Page - STMicroelectronics

номер детали	SPEAR320

подробное описание детали	Embedded MPU with ARM926 core, optimized for factory automation and consumer applications

PDF	73 Pages

Scroll/Zoom	100%

производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

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49 / 73 page

SPEAr320

Electrical characteristics

Doc ID 16755 Rev 5

49/73

6.8

Removing power supplies for power saving

It is recommended to remove the the power supplies in the order shown in Figure 5. So VDD

3.3

supply is to be removed first, then the VDD 2.5 supply, followed by the VDD 1.8 supply and

last the VDD 1.2. The minimum time (Δt) between each power down is >0 µs.

Figure 5.

Power-down sequence

6.9

Power on reset (MRESET)

The MRESET must remain active for at least 10 ms after all the power supplies are in the

correct range and should become active in no more than 10 µs when one of the power

supplies goes out of the correct range.

Power-down sequence

VDD 1.2

VDD1.8

VDD 2.5

VDD 3.3

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