STA2500DTR STMICROELECTRONICS [STMicroelectronics], STA2500DTR Datasheet - Page 49

• Manufacturer Part Number: STA2500DTR
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

STA2500D
8.2
8.3
8.4
Enhanced H4 SPI transport layer
This is the default SPI mode.
The enhanced H4 protocol is based on the H4 protocol as defined by the SIG []. In addition
a messaging protocol is defined for controlling the Deep Sleep mode entry and wake-up,
see
Three messages are defined: SLEEP, WAKEUP and WOKEN. More details on the
messages are available upon request.
At SPI level, the default configuration is used:
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H4 SPI transport layer
As stated in the previous section, the SPI interface is configurable. One possible
configuration is the following, implementing a simple H4 SPI transport layer.
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eSCO over HCI
The STA2500D supports synchronous data packet transfer (eSCO) over HCI.
Section : Deep sleep mode entry and wake-up through enhanced H4
The SPI interface works in half duplex mode
The data are exchanged in multiple of 16 bits
The most significant byte first
The most significant bit first
There is a read and write command from the Host to access the Bluetooth device
The Bluetooth device requests a transfer by the activation of the interrupt line
Flow control on SPI_DO and in a register
The SPI interface works in half duplex mode
The data are exchanged in multiples of 8 bits
The least significant bit first
There is a read and write command from the Host to access the Bluetooth device
The Bluetooth device requests a transfer by the activation of the interrupt line
Flow control on BT_SPI_DO and in a register
Doc ID 16067 Rev 1
HCI transport layer
SPI.
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