User guide

Redpine Signals, Inc. Proprietary and Confidential. Page 188
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5.3 Firmware Upgrade Using SPI Interface without Wireless
Firmware Upgrade feature
The following process should be followed to upgrade the firmware
through SPI interface without wireless firmware upgrade feature.
Figure 40: Firmware Upgrade - Flow 1
Power up
Load Firmware/iuinst1
(step #2 above)
Load Firmware/iuinst2
(step #3)
Load Firmware/iudata
(step #4 )
Bring module out of soft
reset
Load Firmware/ffinst1
(step #7 and 8)
Load Firmware/ffinst2
(step #9 and 10)
Load Firmware/ffdata
(step #11)
Power Cycle or
Reset
SPI interface
initialization
Write 0x00000001 to the
address 0x22000004
Interrupt received, read
Card Ready status (step
#6)
Ready for
normal
operation