Introduction
GR5515I0ND requires external Flash memories. The functionalities and usage vary depending on Flash manufacturer and model. This document depicts the electrical characteristics and functional requirements of GR5515I0ND external Flash memories (GR5515I0ND Flash), providing a reference for users in selecting external Flash memories.
Table 1 lists pins connecting GR5515I0ND to GR5515I0ND Flash.
| GR5515I0ND GPIO Pin | External Flash QSPI Pin |
|---|---|
| GPIO_18 | QSPI_M0_CS_N |
| GPIO_19 | QSPI_M0_IO_3 |
| GPIO_20 | QSPI_M0_CLK |
| GPIO_21 | QSPI_M0_IO_2 |
| GPIO_22 | QSPI_M0_IO_1 |
| GPIO_23 | QSPI_M0_IO_0 |
The figure below shows a pin connection diagram for GR5515I0ND and external Flash memories connected via QSPI pins.
