UM1537 datasheet(14/52 Pages) STMICROELECTRONICS

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Hardware layout and configuration

UM1537

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Doc ID 023059 Rev 1

2.5

Boot option

The STM320518-EVAL evaluation board can boot from:

●

Embedded User Flash

●

System memory with boot loader for ISP

●

Embedded SRAM for debugging

The boot option is configured by setting switch SW1 (BOOT0) and one Option bit in the

Small Information block (SIF). The BOOT0 can also be configured via the RS-232 connector

CN7.

2.6

Audio

The STM320518-EVAL evaluation board supports a speaker that is connected to the DAC

output of the STM32F051R8T6 through an audio amplifier and microphone, which is in turn

connected to the ADC input of the STM32F051R8T6 through a microphone amplifier. The

speaker can be enabled or disabled by setting JP13 (Table 9).

Table 7.

Boot related switch

Switch

configuration

Bit12 in USER

OPTION BYTES

Boot source

0 <-> 1

STM320518-EVAL boot from User Flash when SW1 and

Bit12 in User OPTION bytes set as shown to the left (default

setting).

0 <-> 1

STM320518-EVAL boot from Embedded SRAM when SW1

and Bit12 in User OPTION bytes set as shown to the left.

0<-> 1

STM320518-EVAL boot from System Memory when SW1

and Bit12 in User OPTION bytes set as shown to the left.

Table 8.

Boot0 related jumpers

Jumper

Description

JP5

The Bootloader_BOOT0 is managed by pin 6 of connector CN7 (RS-232 DSR

signal) when JP5 is closed. This configuration is used for the boot loader application

only.

Default Setting: Not fitted

Table 9.

Audio related jumpers

Jumper

Description

JP13

Speaker amplifier U17 is enabled when JP13 is open (default setting).

Speaker amplifier U17 is disabled when JP13 is closed.

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