EVK-NORA-W1 - User guide
UBX-22002764 - R02
Hardware description
Page 16 of 22
C1-Public
3.10
QSPI memory
A Quad SPI PSRAM can be optionally mounted on EVK board at
U2
. The present configuration of
NORA-W1 already includes an internal flash memory, so
U1
should be left unmounted.
PSRAM can be powered from
+3V3
or internal
VDD-SPI
supplies in the module internal. Include either
resistor R70 or R71 to select the preferred choice of power supply to the SPI flash memory chip.
Figure 16: Quad PSRAM EVK - schematic and EVK board view
shows the respective SPI functions for corresponding ESP32-S3 GPIOs and NORA-W10 pins.
Interface function
ESP32-S3 GPIO
NORA-W10 pin
Interface IC function
QSPI-CS1
32
E1
PSRAM chip select
QSPI-CLK
33
F1
SPI0 clock
QSPI-IO3 HD
30
F2
SPI0 Hold
QSPI-IO2 WP
31
D1
SPI0 Write Protect
QSPI-IO1 Q
34
E2
SPI0 Controller Input
Peripheral
QSPI-IO0 D
35
D2
SPI0 Controller Output
Table 6: Quad SPI interface signal overview
