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Philips Semiconductors
UM_1SPP
BGB203 BT 2.0 Serial Port Profile Module User’s Guide
+BTCFG – read/write local configuration options
Description:
This command is used to query (or change) miscellaneous device
configuration options. The options that are supported with this command
are:
Pass-through CD, RI, DTR, DSR signals
This option specifies whether the modem controls signals (CD,
RI, DTR, and DSR) are directly passed through from PIN to
Bluetooth. This differs quite a bit from ordinary use where the
signals are local signals (and their value doesn’t depend on the
remote device) and are managed by the local device. An
example would be the CD output signal (for a DCE device). This
value is asserted when a Bluetooth connection is present, and
de-asserted when no connection is present. If the pass-through
mode is enabled, the value of this signal depends on what the
remote device has set the value of CD to be. This feature is
primarily useful when the state of the modem signals of the
remote device are needed. Note that DTR/DSR flow control
must be enabled in the UART flags to correctly process the
DTR/DSR signals.
DTC/DCE emulation
This option specifies whether or not the device is acting as a
DCE or DTE device. This option controls how the modem
control signals (CD, RI, DTR, DSR) are utilized. The
aforementioned signals are processed as listed in the following
tables:
Table 9: DCE Device
Signal
RI
CD
DTR
DSR
Description
Ring Indicator
Carrier Detect
Data Terminal Ready
Data Set Ready
I/O Direction
Output
Output
Input
Output
Table 10: DTE Device
Signal
RI
CD
DTR
DSR
Description
Ring Indicator
Carrier Detect
Data Terminal Ready
Data Set Ready
I/O Direction
Input
Input
Output
Input
? Koninklijke Philips Electronics N.V. 2005
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Date of release:21 Dec 2005
Published in The Netherlands
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