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docs: Update external RAM voltage control for ESP32-S2/S3

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luweike
2025-09-01 15:15:42 +08:00
parent abaa608074
commit 3a2185b5e8
2 changed files with 10 additions and 2 deletions
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6
docs/en/api-guides/external-ram.rst
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@@ -24,10 +24,14 @@ Hardware
.. note::
.. only:: esp32 or esp32s2 or esp32s3
.. only:: esp32
Some PSRAM chips are 1.8 V devices and some are 3.3 V. The working voltage of the PSRAM chip must match the working voltage of the flash component. Consult the datasheet for your PSRAM chip and {IDF_TARGET_NAME} device to find out the working voltages. For a 1.8 V PSRAM chip, make sure to either set the MTDI pin to a high signal level on boot-up, or program {IDF_TARGET_NAME} eFuses to always use the VDD_SIO level of 1.8 V. Not doing this can damage the PSRAM and/or flash chip.
.. only:: esp32s2 or esp32s3
Some PSRAM chips are 1.8 V devices and some are 3.3 V. The working voltage of the PSRAM chip must match the working voltage of the flash component. Consult the datasheet for your PSRAM chip and {IDF_TARGET_NAME} device to find out the working voltages. For a 1.8 V PSRAM chip, make sure to either set the GPIO45 strapping pin to a high signal level on boot-up, or program {IDF_TARGET_NAME} eFuses to always use the VDD_SPI level of 1.8 V. Not doing this can damage the PSRAM and/or flash chip.
.. only:: esp32p4
Some PSRAM chips are 1.8 V devices and some are 3.3 V. Consult the datasheet for your PSRAM chip and {IDF_TARGET_NAME} device to find out the working voltages.