Owner manual

AW2400mSPI
User’s Manual
PAGE 8
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SPI0 - LEDs and DIP Switches
SPI0isamastermodeSPIthatsendsout4bytespertransaction.Thersttwobytes
are alignment bytes and the last two contain the LED data on MOSI0, and the DIP
switch data on MISO0.
Therstalignmentbyteis0x55,andthesecondis0xAA.Thesetwobytesareused
to determine the start of the transaction (0x55) and the start of the data (0xAA).
LEDs:
/CS_LED
MISO0 XX XX Byte3 Byte4
MOSI0 0x55 0xAA Byte3 Byte4
SCK0
A bit that is set in either of these bytes indicates that the corresponding LED should
be on.
Byte3 b7 b6 b5 b4 b3 b2 b1 b0
PWR RX_ACT LCH5 LCH4 LCH3 LCH2 LCH1 LCH0
PWR:Turnsonwhenthermwareisrunning.IntroubleshootmodePWRchanges
states on the AP every time a search for more SUs takes place. On a SU PWR chang-
es state every time the SU responds to a search for more SUs.
RX_ACT:IndicateswhendatatrafchasbeenreceivedbytheRF.RX_ACTwillbe
set for 32ms when data has been successfully received.
LCH5..0: Indicates what RF channel is currently in use. In troubleshoot mode these
bits indicate what the unit’s device ID is.
Byte4 b7 b6 b5 b4 b3 b2 b1 b0
TX_ACT - RFQ5 RFQ4 RFQ3 RFQ2 RFQ1 RFQ0
TX_ACT:IndicateswhendatatrafcisqueuedupfortransmissionacrosstheRF.