ST10F296E datasheet(90/346 Pages) STMICROELECTRONICS

90 / 346 page

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The bootstrap loader

ST10F296E

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6.7

Selective boot mode

Selective boot mode is a sub-case of alternate boot mode.

The following additional check is made when no signature of the alternate boot mode

signature check is correct:

Address 00’1FFCh is read again.

●

If a value 0000h or FFFFh is obtained, a jump is performed to the standard bootstrap

loader.

●

If the value obtained is not 0000h or FFFFh:

–

High byte bits are disregarded

–

Low byte bits select which communication channel is enabled (see Table 44).

●

0xXX03 configures the selective bootstrap loader to poll for RxD0 and CAN1_RxD.

●

0xXX01 configures the selective bootstrap loader to poll RxD0 only (no bootloading via

CAN).

●

0xXX02 configures the selective bootstrap loader to poll CAN1_RxD only (no

bootloading via UART).

●

other values will let the ST10F296E executing an endless loop into the Test-Flash.

Table 44.

Selective boot mode configurations

Bit

Function

UART selection

0: UART not watched for a start condition

1: UART is watched for a start condition

CAN1 selection

0: CAN1 not watched for a start condition

1: CAN1 is watched for a start condition

2-7

Reserved

Must be programmed to 0 for upward compatibility

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ST10F296E 数据表(PDF) 90 Page - STMicroelectronics

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