參數(shù)資料
型號(hào)： XBIB-U
廠商： Digi International/Maxstream
文件頁(yè)數(shù)： 37/72頁(yè)
文件大小： 1116K
描述： BOARD USB ZIGBEE MOD PRO
設(shè)計(jì)資源： XBIB-U Shematic
標(biāo)準(zhǔn)包裝： 1
附件類型： 接口板
適用于相關(guān)產(chǎn)品： XBee 和 XBee Pro 收音機(jī)
XBee/XBeePRO"燨EM燫F燤odules??02.15.4?爒1.xAx燵2007.05.031]
2007燤axStream,營(yíng)nc.
牋牋?7
Chapter??燫F燤odule燙onfiguration
AV (ADC Voltage Reference) Command
<Serial Interfacing> The AV command is used to
set/read the ADC reference voltage switch. The
XBee-PRO has an ADC voltage reference switch
which allows the module to select between an on-
board voltage reference or to use the VREF pin on
the connector.
This command only applies to XBee-PRO RF Mod-
ules and will return error on an XBee RF Module.
BD (Interface Data Rate) Command
<Serial Interfacing> The BD command is used to
set and read the serial interface data rate used
between the RF module and host. This parameter
determines the rate at which serial data is sent to
the module from the host. Modified interface data
rates do not take effect until the CN (Exit AT Com-
mand Mode) command is issued and the system
returns the 'OK' response.
When parameters 0-7 are sent to the module, the
respective interface data rates are used (as
shown in the table on the right).
The RF data rate is not affected by the BD param-
eter. If the interface data rate is set higher than
the RF data rate, a flow control configuration may
need to be implemented.
Non-standard Interface Data Rates:  
Any value above 0x07 will be interpreted as an
actual baud rate. When a value above 0x07 is sent, the closest interface data rate represented by
the number is stored in the BD register. For example, a rate of 19200 bps can be set by sending
the following command line "ATBD4B00". NOTE: When using MaxStreams X-CTU Software, non-
standard interface data rates can only be set and read using the X-CTU Terminal tab. Non-stan-
dard rates are not accessible through the Modem Configuration tab.
When the BD command is sent with a non-standard interface data rate, the UART will adjust to
accommodate the requested interface rate. In most cases, the clock resolution will cause the
stored BD parameter to vary from the parameter that was sent (refer to the table below). Reading
the BD command (send "ATBD" command without an associated parameter value) will return the
value actually stored in the modules BD register.
CA (CCA Threshold) Command
<RF Interfacing> CA command is used to set and
read CCA (Clear Channel Assessment) thresholds.
Prior to transmitting a packet, a CCA is performed
to detect energy on the transmit channel. If the
detected energy is above the CCA Threshold, the
RF module will not transmit the packet.
Parameters燬ent燰ersus燩arameters燬tored
BD Parameter Sent (HEX)
Interface Data Rate (bps)
BD Parameter Stored (HEX)
0
1200
0
4
19,200
4
7
115,200
7
12C
300
12B
1C200
115,200
1B207
AT Command: ATAV
Parameter Range:0 - 1
Parameter
Configuration
0
VREF Pin
1
Internal (on-board
reference - VCC)
Default Parameter Value:0
Minimum Firmware Version Required: v1.xA0
AT Command: ATBD
Parameter Range:0 - 7 (standard rates)
0x80-0x1C200 (non-stndard rates)
Parameter
Configuration (bps)
0
1200
1
2400
2
4800
3
9600
4
19200
5
38400
6
57600
7
115200
Default Parameter Value:3
AT Command: ATCA
Parameter Range: 0 - 0x50 [-dBm]
Default Parameter Value: 0x2C
  (-44 decimal dBm)
Minimum Firmware Version Required: v1.x80
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