ST10F272M datasheet(81/175 Pages) STMICROELECTRONICS

Part #	ST10F272M

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

PDF	175 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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81 / 175 page

ST10F272M

System reset

81/176

Figure 18.

Asynchronous power-on RESET (EA = 0)

3 to 8 TCL depending on clock source selection

Hardware reset

The asynchronous reset must be used to recover from catastrophic situations of the

application. It may be triggered by the hardware of the application. Internal hardware logic

and application circuitry are described in Reset circuitry chapter and Figures 30, 31 and 32.

It occurs when RSTIN is low and RPD is detected (or becomes) low as well.

RSTIN

P0[15:13]

P0[12:2]

not t.

transparent

not t.

P0[1:0]

not t.

not transparent

V18

XTAL1

...

3..8 TCL(1)

RST

Latching point of Port0 for

system start-up configuration

VDD

≥ 1ms (for on-chip VREG stabilization)

RPD

ALE

≥ 1.2ms (for resonator oscillation + PLL stabilization)

≥ 10.2ms (for crystal oscillation + PLL stabilization)

RSTF

≤ 500ns

(After Filter)

≥ 50ns

8 TCL

transparent

3..4 TCL

ST10F272M Datasheet(PDF) 81 Page - STMicroelectronics