Reset Sources; Boot Mode; Description; Table 4. Boot Mode Pins - ST STM32MP135F-DK User Manual

7.6

Reset sources

The reset signal of STM32MP135F-DK is active low. The internal PU forces the RST signal to a high level.
The sources of reset are:
• Reset button B5 (black button)
• STPMIC1
• Embedded STLINK-V3
• STM32MP135F-DK
7.7

Boot mode

7.7.1

Description

At startup, the boot pins select the boot source used by the internal boot ROM.
configurations of the boot pins.
Boot 0
0
0
1
Table 5 shows the configurations of the boot mode switch SW1.
Switch positions
1. Not connected.
2. X is either 1 or 0.
UM2993 - Rev 2
Table 4. Boot mode pins
Boot 1
0
0
0
Other combinations
Table 5. Boot mode switch SW1
(1)
Boot pin selection
Boot0: 0
Boot1: 0
Boot2: 0
(2)
NC: X
Boot0: 0
Boot1: 0
Boot2: 1
NC: X (2)
Boot0: 1
Boot1: 0
Boot2: 1
(2)
NC: X
Table 4
Boot 2
0 Forced USB boot for programming.
1 Reserved.
™
1
SD card on SDMMC1.
Not supported.
Forced USB boot for programming.
Reserved.
™
SD card on SDMMC1.
UM2993
Reset sources
describes the
Boot mode
Boot mode
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