ST10F272M_12 datasheet(44/176 Pages) STMICROELECTRONICS

Part #	ST10F272M

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

PDF	176 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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44 / 176 page

Bootstrap loader

ST10F272M

44/176

Doc ID 12968 Rev 3

6.3

Alternate and selective boot mode (ABM and SBM)

6.3.1

Activation of the ABM and SBM

Alternate boot is activated with the combination ‘01’ on Port0L[5..4] at the rising edge of

RSTIN.

6.3.2

User mode signature integrity check

The behavior of the selective boot mode is based on the computing of a signature between

the content of two memory locations and a comparison with a reference signature. This

requires that users who use selective boot have reserved and programmed the Flash

memory locations.

6.3.3

Selective boot mode

When the user signature is not correct, instead of executing the standard bootstrap loader

(triggered by P0L.4 low at reset), additional check is made.

Depending on the value at the user key location, the following behavior occurs:

●

A jump is performed to the standard bootstrap loader

●

Only UART is enabled for bootstrapping

●

Only CAN1 is enabled for bootstrapping

●

The device enters an infinite loop

ST10F272M Datasheet(PDF) 44 Page - STMicroelectronics