Reset Sources; Boot Option; Table 8. Boot Selection Switch; Table 9. Boot Related Jumpers - ST STM32H757I-EVAL User Manual

Solder
bridge
SB4
Note: For Ethernet clock and jumper JP5 configuration refer to Section Ethernet.
6.6

Reset sources

The reset signal of STM32H7x7I-EVAL Evaluation board is low active and the reset sources include:
• Reset button B1
• Debugging tools from JTAG/SWD connector CN9 and ETM trace connector CN8
• Daughterboard from CN6
• Embedded STLINK-V3E
• RS232 connector CN2 for ISP.
Note: The jumper JP6 has to be ON for RESET handled by pin 8 of RS232 connector CN2 (CTS signal).
6.7

Boot option

The STM32H7x7I-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 the switch SW1 (BOOT) and the boot base address programmed in the
BOOT_ADD0 and BOOT_ADD1 option bytes. The BOOT can be also configured through the RS232 connector
CN2.
Switch configuration
(Default setting)
Jumper
The Bootloader_BOOT0 is managed by pin 6 of connector CN2 (RS232 DSR signal) when JP3 is ON. This
configuration is used for boot-loader application only.
JP3
Default Setting: OFF
UM2525 - Rev 3
PC15 is connected to 32-kHz crystal when SB4 is OFF (Default setting).
PC15 is connected to extension connector CN7 when SB4 is ON. In such case R17 must be removed to avoid
disturbance due to the 32-kHz quartz.
Table 8.
Boot address option bytes
BOOT_ADD0 [15:0]
BOOT_ADD1
[15:0]
Table 9.
Description
Boot selection switch
CPU boot address defined by user option byte
BOOT_ADD0[15:0]
ST programmed value: Flash at 0x0800 0000.
CPU boot address defined by user option byte
BOOT_ADD1[15:0]
ST programmed value: System boot loader at 0x0000 0000.
Boot related jumpers
Description
UM2525
Reset sources
Boot space
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