9XTend™
OEM
RF
Module
–
Product
Manual
v1.2.4
©
2005
MaxStream,
Inc.
Confidential
&
Proprietary
20
BD (Baud Rate) Command
AT Command: ATBD
Binary Command: 0x15 (21 decimal)
Parameter Range: 0 – 8
Parameter
Value
BAUD (bps)
Configuration
0 1200
1 2400
2 4800
3 9600
4 19200
5 38400
6 57600
7 115200
8 230400
Default Parameter Value: 3
Number of bytes returned: 1
<Serial Interfacing> BD Command is used to
set/read the UART I/O serial data rate (the rate at
which serial data is sent to the module). Newly
modified serial data rates do not take effect until
the module exits Command Mode [refer to CN
(Exit Command Mode) and CT (Command Mode
Timeout) Commands].
The RF data rate is not affected by the BD
Command.
Note: If the serial data rate is set to exceed the
fixed RF data rate of the XTend module,
flow
control may need to be implemented. Refer to the
Pin Signals [p6] and CS (GPO1 Configuration
Command [p21] sections for more information.
BR (RF Data Rate) Command
AT Command: ATBR
Binary Command: 0x39 (57 decimal)
Parameter Range: 0 – 1
Parameter
Value
BAUD (bps)
Configuration
0 9600
1 115200
Default Parameter Value: 1
Number of bytes returned: 1
<RF Interfacing> BR Command is used to
set/read the RF data rate (rate that RF data is
transmitted over-the-air) of the module.
BT (Guard Time Before) Command
AT Command: ATBT
Binary Command: 0x04 (4 decimal)
Parameter Range: 0 – 0xFFFF
[x
100
milliseconds]
Default Parameter Value: 0x0A (10 decimal)
Number of bytes returned: 2
Related Commands: AT (Guard Time After),
CC (Command Sequence Character)
<Command Mode Options> BT Command is used
to set/read the time-of-silence that precedes the
command sequence character (CC Command) of
the AT Command Mode Sequence.
Refer to the CC command to view the default AT
Command Sequence.
CC (Command Sequence Character) Command
AT Command: ATCC
Binary Command: 0x13 (19 decimal)
Parameter Range: 0x20 – 0x7F
Default Parameter Value: 0x2B (ASCII “+” sign)
Number of bytes returned: 1
Related Commands: AT (Guard Time After), BT
(Guard Time Before)
<Command Mode Options> CC Command is used
to set/read the ASCII character used between
Guard Times of the AT Command Mode Sequence
(BT+ CC + AT). The AT Command Mode
Sequence activates AT Command Mode (from
Idle Mode).
The default sequence used to enter AT Command Mode is as follows:
•
No characters sent for 1 second [BT (Guard Time Before) Command]
•
Send three plus characters “+++” [CC (Command Sequence Character) Command]
•
No characters sent for 1 second [AT (Guard Time After) Command]
All of the values in this sequence can be adjusted.
