3.12 QSPI Serial Flash (U7)
The WBZ351 Curiosity Board has an on-board 64-Mb, 2.3-3.6V Serial Quad I/O (SQI) Flash (SST26VF064B-104I/MF) (U7) memory for storage of data. A default SST26VF064B-104I/MF at power-up enables WP# and HOLD pins and disables SIO2 and SIO3 pins, allowing for SPI protocol operations without register configuration. Register configuration is required to switch to Quad I/O operation with QSPI.
| QSPI Flash | Pin on WBZ351PE Module | Description |
|---|---|---|
CE | PB13, QSPI_CS | QSPI chip select |
SO/SIO1 | PB12, QSPI_DATA1 | QSPI data channel 1 |
WP/SIO2 | PB11, QSPI_DATA2 | QSPI data channel 2 |
VSS | GND | Ground |
SI/SIO0 | PA0, QSPI_DATA0 | QSPI data channel 0 |
SCK | PA1, QSPI_SCK | QSPI clock |
Hold/SIO3 | PA2, QSPI_DATA3 | QSPI data channel 3 |
VDD | VDD | VDD |