Rev: b
Low power Bluetooth
™ Module with antenna- F2M03GLA
Datasheet
5.1.1 General I/O
General I/O interfaces are used for different purposes between the WU firmware and the Host:
•
Asynchronous data interface – configuration of the WU firmware or exchange transparent digital
information between the connected Bluetooth devices.
•
Synchronous voice interface – exchange transparent voice information between the connected
Bluetooth devices.
•
Bluetooth connectivity PIO interfaces – indication and disconnection of the established Bluetooth
connection.
•
Emulate serial handshaking PIO lines interface – DTE or DCE serial handshake emulation between
the connected Bluetooth devices.
UART interface (Asynchronous data and configuration):
UART
Signal
Direction
Active (TTL)
Description
TX
Output
High
UART transmit data
RX
Input
High
UART receive data
RTS
Output
Low
UART request to send
CTS
Input
Low
UART clear to send
Voice interface:
CODEC I/O
Signal Direction
Description
MIC_P
Input (analogue)
Microphone input positive
MIC_N
Input (analogue)
Microphone input negative
AUX_DAC
Output (analogue)
Microphone input bias
SPKR_P
Output (analogue)
Speaker output positive
SPKR_N
Output (analogue)
Speaker output negative
PIOs are used to control/monitor the Bluetooth connectivity of the WU firmware.
PIO
Signal
Direction
Active (TTL)
Description
2
Input
High
Request to close the current Bluetooth connection to the remote
device.
3
Output
High
Indicates that a successful Bluetooth connection is established with a
remote device.
To prevent connections or to close the current Bluetooth connection PIO[2] can be set high.
PIO[3] is held low as long as there is no Bluetooth connection. As soon as a successful Bluetooth
connection has been established with a remote device, PIO[3] goes high.
PIOs can also be used to emulate serial handshaking lines between the connected Bluetooth devices.
Emulation can either be DTE or DCE.
Emulated Signal
PIO
Signal Direction
Emulate DTE
Signal Direction
Emulate DCE
Active (TTL)
RI
4
Input
Output
High
DTR
5
Output
Input
High
DCD
6
Input
Output
High
DSR
7
Input
Output
High
While the handshaking lines are transparent to the data channel these I/O may also be used to transfer
digital signals between two Free2move devices running WU
© 2006 Free2move AB
Page 11(44)
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