ST10F273E datasheet(88/179 Pages) STMICROELECTRONICS

Part #	ST10F273E

Description	16-bit MCU with 512 Kbyte Flash memory and 36 Kbyte RAM

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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System reset

ST10F273E

88/179

Figure 19.

Synchronous short / long hardware RESET (EA = 1)

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

2) If during the reset condition (RSTIN low) RPD voltage drops below the threshold voltage (about 2.5V for 5V

operation), the asynchronous reset is immediately entered.

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

4) Bit BDRSTEN is cleared after reset.

5) 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

FLARST

RST

≤1 ms

1024 TCL

≤2 TCL

VRPD > 2.5V Asynchronous Reset not entered

200

µA 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

3)

≤12 TCL

1)

≤500 ns

≥ 50 ns

≤500 ns

≥ 50 ns

≤500 ns

≥ 50 ns

IBUS-CS

7 TCL

(Internal)

8 TCL

not t.

2)

4)

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