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UM2403
8.5
Jumper
configuration
CN10 pin 19 and
pin 17 closed by
jumper
CN10 pin 19 and
pin 21 closed by
jumper
CN10 pin 19 and
pin 21 closed by
jumper
Jumper
JP9
8.6
8.6.1
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Boot Option
The STM32G081B-EVAL Evaluation board is able to boot from:
•
Embedded User Flash
•
System memory with boot loader for ISP
•
Embedded SRAM for debugging
The boot option is configured by closing JP9 pin2-3 and setting one jumper cap on CN10
among pin 17, pin 19 and pin 21 and one option bit (see
Table 6. Boot related jumper
Bit25 in USER
OPTION BYTES
X
0
1
Table 7. Boot0 related jumpers
PA14-BOOT0 is used as SWCLK when JP9 is set as shown on the right (default setting).
The Bootloader_BOOT0 is managed by pin 6 of connector CN11 (RS232 DSR signal) and it is
connected to PA14-BOOT0 when JP9 is set as shown on the right. This configuration is used for
boot loader application only.
Peripherals on mother board
Audio
The STM32G081B-EVAL Evaluation board supports stereo audio playback and microphone
recording by an external headset connected on audio jack CN15. Audio play is connected to
DAC output of STM32G081RBT6 through an audio amplifier and microphone on headset is
connected to ADC input of STM32G081RBT6 through a microphone amplifier. Audio
amplifier can be enabled or disabled by setting of JP18 and mono/stereo playback can be
chosen by setting of JP6, refer to
Hardware layout and configuration
Boot from
STM32G081B-EVAL boot from User Flash (default setting)
STM32G081B-EVAL boot from Embedded SRAM
STM32G081B-EVAL boot from System Memory
Description
Table 8
for detail.
UM2403 Rev 1
Table 6
and
Table
7).
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