Connect the Longan Nano to a W25Q64JV 3V 64MBit SPI Flash Memory (standard mode, no dual or quad I/O)
Read some registers and read / write / erase flash.
| Longan Nano | W25Q64JV |
|---|---|
| 3V3 | Vcc |
| B8 | CS |
| B13 SCK1 | CLK |
| B14 MISO1 | DO |
| B15 MOSI | DI |
| GND | GND |
Access is working but the minimum 4k sector erase size is big compared to Longan's total of 32k RAM when just modifying a few bytes.