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STBLC01QTR Fiches technique(PDF) 24 Page - STMicroelectronics

No de pièce STBLC01QTR
Description  Bluetooth low energy controller
PDF  40 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STBLC01QTR Fiches technique(HTML) 24 Page - STMicroelectronics

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Host controller interface (HCI)
STLBC01
24/40
DocID022984 Rev 2
Controller to host flow
When the controller needs to communicate with the host, the following flow is followed:
1.
Controller sets IRQ line to '1'. This means that the controller has at least 1 byte of data
to transmit.
2.
Host pulls down the MOSI signal.
3.
Host activates CSN after 100 ns.
4.
Host starts an SPI transaction by sending a data byte equal to 0x00.
5.
Host reads data sent by the controller on the MISO line.
6.
If IRQ is set to '0' during an SPI transaction, then the controller has no other data to
transmit. Once all bits of the transaction are read, the host can stop sending a clock.



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