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5.3 Serial Flash

The BRD4311A Radio Board is equipped with an 8 Mbit Macronix MX25R SPI flash that is connected directly to the BGM220P. The

figure below shows how the serial flash is connected to the BGM220P.

PC02 (US0_CLK)

PC00 (US0_TX)

PC01 (US0_RX)

PA04 (GPIO)

BGM220P

MX25R8035F

SCLK

MOSI

MISO

SCS

VMCU

VDD

8 Mbit

Figure 5.3. Radio Board Serial Flash

The MX25R series are ultra low power serial flash devices, so there is no need for a separate enable switch to keep current consump-

tion down. However, it is important that the flash is always put in deep power down mode when not used. This is done by issuing a

command over the SPI interface. In deep power down, the MX25R typically adds approximately 100 nA to the radio board current con-

sumption.

UG432: BGM220P Wireless Gecko Module Starter Kit User's Guide

Peripherals

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