DVK-BTM411 Laird Technologies, DVK-BTM411 Datasheet - Page 48

• Manufacturer Part Number: DVK-BTM411
• Description: BLUETOOTH EVAL BOARD BTM411
• Manufacturer: Laird Technologies
• Type: Transceiverr

Specifications of DVK-BTM411

• Frequency: 2.4GHz
• Wireless Frequency: 2.402 GHz to 2.48 GHz
• Interface Type: UART
• Data Rate: 2.1 Mbps
• Operating Voltage: 3 V to 3.3 V
• Antenna: Multilayer Ceramic Integrated
• Operating Temperature Range: - 30 C to + 70 C
• Output Power: 4 dBm
• Technology/ Type: Development Kit
• For Use With/related Products: BTM411
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: DVK-BTM411

BTM410/411
Bluetooth
AT COMMAND SET
REFERENCE
48 www.lairdtech.com
®
AT Data Module
Register
S552
S553
S554
S555
S558
S559
Deflt.
$0122
$0201
0
1
0
0
Range
$0..$fff
$0..$fff
0..900
1..7
0..1
0..3
Description
This register specifies in each 4 bit nibble, how the DTR, DCD, RI
output pins are controlled when in a Bluetooth connection
Nibble 0..3 specifies the source for DTR
4..7 specifies the source for DCD
8..11 specifies the source for RI
Each nibble can take the following value:-\
0 Do NOT touch the I/O
1 Always deassert
2 Always assert
3 If RTC bit in CONTROL_IND is 1 then assert otherwise deassert
4 If RTR bit in CONTROL_IND is 1 then assert otherwise deassert
5 If DV bit in CONTROL_IND is 1 then assert otherwise deassert
6 If IC bit in CONTROL_IND is 1 then assert otherwise deassert
If this register is changed while in command and connected mode,
then on going back online using the ATO command, the modem
output lines will get refreshed.
This register specifies in each 4 bit nibble, how the DTR,DCD,RI
output pins are controlled when NOT in a Bluetooth connection
Nibble 0..3 specifies the source for DTR
4..7 specifies the source for DCD
8..11 specifies the source for RI
In addition it also refers to S Register 552 to see if the relevant pin
is an input or not to be touched. If the nibble in 552 is 0, then the
relevant pin is an input.
Each nibble can take the following value:-
0 Always deassert
1 Always assert
2 Assert if RING is being sent to the host
Post Reset Window: If S Register 512>=2 and <=7 then this regis-
ter specifies a time in seconds for which the device will stay in the
S512 mode after power up or reset. On timeout, it will abort the
discoverable and/or connectable and fall back into S512=1 mode,
when it is deaf and dumb. (not connectable, not discoverable)
Note that if AT+BTR has been used to specify a peer device, then
on reverting to mode 1, it will attempt to make a connection to
that peer device. A power cycle, reset via BREAK or ATZ is required
to see the effects of change.
If S Register 554 is nonzero, then after the post reset (defined by
S554) window expires, the mode will revert to the mode specified
in this register. This allows, for example, the device to be discover-
able and connectable on power up (mode 4 or 7) and on window
timer expiry to revert to connectable only (mode 3 or 6).
A power cycle, reset via BREAK or ATZ is required to see effects of
a change. In some firmware builds, S Registers 565 to 569 inclu-
sive are visible, which allows the start-up mode to depend on the
state of RI line (Setting S Reg 565 forces the RI pin to be config-
ured as an input). For this feature to be active, SReg 565 should be
set to 1. In that case, on start-up, if RI is asserted, then the start-up
mode is defined by S Reg 568 and if de-asserted then S Reg 569.
When 1, the following responses; “RING”, “NO CARRIER” and
“CONNECT” are replaced by “BTIN”, “BTDOWN” and “BTUP”
respectively. This will eliminate ambiguity when the module has
a Bluetooth connection to an AT modem which also gives these
responses.
This specifies a mask. When Bit 0 is 1, the response word “ERROR“
is replaced by “BTERR” and “OK” is replaced by “ok”.
When Bit 1 is 1, then error responses do not include the error
number and instead the error number can be retrieved using
ATI12.
Laird Technologies