ST10F276E datasheet(117/235 Pages) STMICROELECTRONICS

номер детали	ST10F276E

подробное описание детали	16-bit MCU with MAC unit 832 Kbyte Flash memory and 68 Kbyte RAM

PDF	235 Pages

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производитель	STMICROELECTRONICS [STMicroelectronics]

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117 / 235 page

ST10F276E

System reset

Doc ID 12303 Rev 3

117/235

Figure 31.

Synchronous long hardware RESET (EA = 0)

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.

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 19.1).

3 to 8 TCL depending on clock source selection.

19.4

Software reset

A software reset sequence can be triggered at any time by the protected SRST (software

reset) instruction. This instruction can be deliberately executed within a program, e.g. to

leave bootstrap loader mode, or on a hardware trap that reveals system failure.

On execution of the SRST instruction, the internal reset sequence is started. The

microcontroller behavior is the same as for a synchronous short reset, except that only bits

P0.12...P0.8 are latched at the end of the reset sequence, while previously latched, bits

P0.7...P0.2 are cleared (that is written at ‘1’).

A Software reset is always taken as synchronous: there is no influence on Software Reset

behavior with RPD status. In case Bidirectional Reset is selected, a Software Reset event

pulls RSTIN pin low: this occurs only if RPD is high; if RPD is low, RSTIN pin is not pulled

low even though Bidirectional Reset is selected.

Refer to Figure 32 and Figure 33 for unidirectional SW reset timing, and to figures 34, 35

and 36 for bidirectional.

ST10F276E датащи(PDF) 117 Page - STMicroelectronics