====NUCLEO-H7A3ZI-Q====

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{{boards:h7a3ziqpinout.jpg?100|Pinout}}
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Cortex-M7 MCU at 280 MHz.

The Q suffix indicates that this processor contains a SMPS.

The user manual explains that the SMPS must be enabled in
firmware otherwise there can be problems connecting to
the device over ST-LINK.

===RAM===

^Address ^Type^Size^Alias^
|0x00000000 .. 0x0000FFFF|ITCM       |64KB | |
|0x20000000 .. 0x2001FFFF|DTCM       |128KB| |
|0x24000000 .. 0x2403FFFF|AXI SRAM1  |256KB| |
|0x24040000 .. 0x2409FFFF|AXI SRAM2  |384KB| |
|0x240A0000 .. 0x240FFFFF|AXI SRAM3  |384KB| |
|0x30000000 .. 0x3000FFFF|AHB SRAM1  |64KB| |
|0x30010000 .. 0x3801FFFF|AHB SRAM2  |64KB| |
|0x38000000 .. 0x38007FFF|SRD SRAM   |32KB| |
|0x38800000 .. 0x38800FFF|BACKUP SRAM| 4KB| |

===Demo===

See [[projects:modbus#rtu|here]] for a Modbus demo using this board.
===Resources===

[[https://www.st.com/en/evaluation-tools/nucleo-h7a3zi-q.html|Product page]]

[[https://www.st.com/resource/en/user_manual/dm00499171-stm32h7-nucleo144-boards-mb1363-stmicroelectronics.pdf|User manual]]

[[https://www.st.com/resource/en/schematic_pack/mb1363-h7a3ziq-d01_schematic.pdf|Schematic]]

[[https://www.st.com/resource/en/datasheet/stm32h7a3zi.pdf|MCU datasheet]]

[[https://www.st.com/resource/en/reference_manual/rm0455-stm32h7a37b3-and-stm32h7b0-value-line-advanced-armbased-32bit-mcus-stmicroelectronics.pdf|MCU reference manual]]