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Laird Technologies
BTM520/521
Bluetooth
®
Multimedia Plus Module
CONFIGURING
THE BTM520/521
REGISTER
DEFAULT
RANGE
COMMENT
S325
1
0..1
Store link key automatically on dedicated bonding outgoing (DBO),
identical with S538
S326
1
0..1
Store link key automatically on general bonding outgoing (GBO)
S327
1
0..1
Store link key automatically on dedicated bonding incoming (DBI)
S328
1
0..1
Store link key automatically on general bonding incoming (GBI)
S329
0
0..1
Enable legacy (BISM2) response format
S330
1
1..15
Configure inquiry response of AT+BTI (Bitmask):
1 – show device address
2 – show class of device
4 – show friendly name
8 – show extended inquiry data
Values can be ORed
S415
0
0..1
Enable Microphone Input Gain, adds extra 24dB to input gain
S416
0
0..1
Enable MicBias
S417
0
0..15
Set MicBiasCurrent
S418
0
0..15
Set MicBiasVoltage
S419
6
0..6
Set sampling rate for Audio Loopback Mode
0 = 8 kHz
1 = 11.025 kHz
2 = 16 kHz
3 = 22.050 kHz
4 = 24 kHz
5 = 32 kHz
6 = 44.1 kHz
S504
0
0..1
Setting to 1 will force S0 to -1 and will suppress messages arising from
connections or pairing. E.g. CONNECT, NO CARRIER, RING, PAIR etc.
Suppressing connection based messaged allows the device to be
configured in cable replacement mode.
S505
10
2..120
Minimum delay before abandoning connection attempt as a master.
Referenced by ATD. In units of seconds. See S Registers 530 and 543 also.
Please note that as disconnection time can vary, this register only guarantees
the minimum delay. Note that for invalid addresses specified in the ATD
command, the “NO CARRIER” response will be immediate. See S register
560 for specifying disconnect max timeout.
S506
1
0..1
Enable/Disable echoes. The ATEn command also affects this.
S507
0
0..2
When set to 0, a connection can be dropped using ^^^ escape sequence only
and the state of DSR line is ignored.
When set to 1 a connection can be dropped using EITHER the ^^^ escape
sequence OR the DSR handshaking line. When set to 2, a connection can
only dropped using a deassertion of DSR. Mode 2 provides for the highest
data transfer rate.
If the status of the DSR line is to be conveyed to the remote device as a low
bandwidth signal then this register MUST be set to 0, otherwise a deassertion
of DSR will be seen as a request to drop the Bluetooth
®
connection.
This register affects S Register 536 – see details of 536
