Introduction
In GR551x System-on-Chip (SoC) series, GR5515I0ND or GR5515I0NDA requires external Flash memories. The Flash functionalities and usage vary depending on Flash manufacturer and model. This document depicts the electrical characteristics and functional requirements of GR5515I0ND/GR5515I0NDA external Flash memories (GR5515I0ND Series Flash), providing a reference for users in selecting external Flash memories.
Table 1 lists pins connecting GR5515I0ND/GR5515I0NDA to GR5515I0ND Series Flash.
GR5515I0ND/GR5515I0NDA 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/GR5515I0NDA and external Flash memories connected via QSPI pins.