Datasheet

2 Pin Definition
ESP32S3R2 / ESP32S3FH4R2 SiP PSRAM (2 MB, Quad SPI)
SPICLK CLK
SPICS1 CE#
SPID SI/SIO0
SPIQ SO/SIO1
SPIWP SIO2
SPIHD SIO3
ESP32S3R8 / ESP32S3R8V SiP PSRAM (8 MB, Octal SPI)
SPICLK CLK
SPICS1 CE#
SPID DQ0
SPIQ DQ1
SPIWP DQ2
SPIHD DQ3
GPIO33 DQ4
GPIO34 DQ5
GPIO35 DQ6
GPIO36 DQ7
GPIO37 DQS/DM
2.7 Power Scheme
ESP32-S3 has four input power pins:
• VDDA1
• VDDA2
• VDD3P3_RTC
• VDD3P3_CPU
And one input/output power pin:
• VDD_SPI
VDDA1 and VDDA2 are the input power supply for the analog domain.
VDD_SPI can be an input power supply or output power supply. It can be powered by Flash Voltage Regulator
(nominal 1.8 V) or by VDD3P3_RTC via R
SP I
(nominal 3.3 V). As the SiP flash/PSRAM in ESP32-S3FN8,
ESP32-S3R2, and ESP32-S3R8 operates at 3.3 V, VDD_SPI must be powered by VDD3P3_RTC via R
SP I
.
Software can power off VDD_SPI to minimize current leakage of flash in Deep-sleep mode.
VDD3P3_RTC is the input power supply for Low Power Voltage Regulator that powers the RTC domain.
VDD3P3_CPU and VDD3P3_RTC power Digital System Voltage Regulator at the same time that further powers
the Digital System domain.
VDD3P3_RTC is the input power supply for RTC IO.
VDD3P3_CPU is the input power supply for Digital IO.
VDD_SPI is the input power supply for SPI IO.
Either VDD_SPI or VDD3P3_CPU can be selected as the input power supply for SPI/Digital IO.
Espressif Systems 20
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ESP32-S3 Series Datasheet v1.2