SLWSTK6061A Datasheet, PDF (15/32 Pages) Silicon Laboratories – UG182: EFR32 Flex Gecko 2400/868 MHz Wireless Starter Kit

UG182: EFR32 Flex Gecko 2400/868 MHz Wireless Starter Kit
Peripherals
6.3 Serial Flash
The BRD4250B radio board is equipped with an 8 Mbit Macronix MX25R SPI flash that is connected directly to the EFR32 Flex Gecko.
Figure 6.3 Radio Board Serial Flash on page 14 shows how the serial flash is connected to the EFR32.
VMCU
PC8 (US1_CLK#11)
PC6 (US1_TX#11)
PC7 (US1_RX#11)
PA4 (US1_CS#1)
SCLK
MOSI
MISO
SCS
VDD
8 Mbit
MX25R8035F
EFR32
Figure 6.3. 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.
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Rev. 1.00 | 14