User Manual

頁4
2.5 Serial Flash Device
TheapplicationcodefortheJN5148isstoredinaserialFlashmemorydevicewhichisprovided
onthedongle.Thisistypicallya4‐Mbitdevice,suchastheW25x40
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2.6 32kHz Crystal Oscillator
TheJN5148hasaninternal32kHzRCoscillator.Inordertoprovidemoreaccuratesystem
timingsanexternal32kHzcrystalcanbeusedwuththedevice.ThisisprovidedontheUSB
dongleandcanbeenabledusingtheintegratedPeripheralsApilibray.refertoIntegrated
PeripheralsAPIReferenceManual
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3 Programming
When the IEEE 802.15.4 USB Dongle is powered up, it attempts to load an application from the
serial Flash device and then run the application. This may be a self-contained application that
sends and receives wireless data, and which does not need to communicate with the host.
Alternatively, it may communicate via the USB to an application running on the host, such as a
Windows program, and communicate with a wireless device or network.
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