ST10F272M datasheet(87/175 Pages) STMICROELECTRONICS

No. de pieza	ST10F272M

Descripción Electrónicos	16-bit MCU with 256 Kbyte Flash memory and 20 Kbyte RAM

PDF	175 Pages

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Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

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87 / 175 page

ST10F272M

System reset

87/176

Figure 22.

Synchronous short / long hardware RESET (EA = 0)

RSTIN assertion can be released there. Refer also to Section 21.1 for details on minimum pulse duration.

If during the reset condition (RSTIN low), RPD voltage drops below the threshold voltage (about 2.5V for

5V operation), the asynchronous reset is then immediately entered.

3 to 8 TCL depending on clock source selection.

RSTIN pin is pulled low if bit BDRSTEN (bit 3 of SYSCON register) was previously set by software. Bit

BDRSTEN is cleared after reset.

Minimum RSTIN low pulse duration shall also be longer than 500ns to guarantee the pulse is not masked

by the internal filter (refer to Section 21.1).

P0[15:13]

not transparent

RSTF

P0[12:2]

transparent

not t.

P0[1:0]

not t.

not transparent

RST

1024 TCL

3..8 TCL(3)

(2) V

RPD > 2.5V Asynchronous Reset not entered

200µA Discharge

RPD

RSTOUT

At this time RSTF is sampled HIGH or LOW

so it is SHORT or LONG reset

(After Filter)

RSTIN

< 1032 TCL

≤4 TCL(5)

(4)

≤12 TCL

(1)

≤ 500 ns

≥ 50 ns

≤ 500 ns

≥ 50 ns

≤ 500 ns

≥ 50 ns

ALE

8 TCL

not t.

ST10F272M Datasheet(PDF) 87 Page - STMicroelectronics

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