WI.M868X Radiotronix, WI.M868X Datasheet - Page 9

• Manufacturer Part Number: WI.M868X
• Description: RF Modules & Development Tools Wi.M868X MODULE
• Manufacturer: Radiotronix

Specifications of WI.M868X

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: WIM868X

WI.M868X-R/ WI.M868T-R/ WI.M868X-DP-R DATASHEET
Table 1, Wi.M868X-R
Table 2, Wi.M868X-DP-R
Internally, the XE1203F has two identical sets of programming registers (SWParam) that control the operation of
the chip. Generally, one set is programmed for receive mode and the other set is programmed for transmit
mode. For the Wi.M868X-R
Wi.M868T-R
For the Wi.M868T-R
Register set 1 is selected when TRSW is low, and register set 2 is selected when TRSW is high.
In addition to the SWParam registers, there are three other register sets that set the operation of the module.
The RTParam registers control the operation of the radio itself. The FSParam registers control the operation of
the frequency synthesizer. The ADParam register determines the parameters of operation for the digital data
interface. All of these registers are used in both receive and transmit mode. They can be programmed to meet
the customer’s needs. A specific requirement of the Wi.M868X-R
RTParam must be set to 1. For the Wi.M868T-R
suits the application.
When the SWITCH pin of the XE1203F is configured as an output, the ConfigSwitch register selects the
SWParam register set to use. A value of 0 selects SWParam0; a value of 1 selects SWParam1.
The receive chain is a traditional zero-IF architecture. The filter bandwidth is programmable and can be set to
200 kHz or 600 kHz. RSSI is derived from the I-channel. It is digitized internally and can be read from the
DataOut register.
Frequency error indication (FEI) is derived from both the I and Q channels. Its value can be read from the
DataOut register. FEI can be used to compensate for slight frequency differences between the transmitting
module and receiving module.
The demodulator re-creates the data stream. It demodulates the FSK modulated base-band carrier, extracts the
bit stream timing, and samples the raw bit stream to accurately reproduce the original data.
In receive mode, the data interface is synchronous, operating as an SPI master. The module determines the
data timing; the DCLK pin is the clock and the DATA pin is the data output.
Low
High
Low
High
Low
High
Low
High
Low
High
Low
High
RX
RXSW
Low
Low
High
Low
Low
High
High
High
TM
TX
/ Wi.M868X-DP-R
Low
Low
Low
Low
High
High
High
High
TM
Low
Low
High
High
module, the register sets can be used to quickly switch between two frequencies.
Switch
TM
/ Wi.M868T-R
TM
TM
TRSW
module, set 1 is for receive mode and set 2 is for transmit mode. With the
Switch and Mode Parameters
TM
, you can utilize either register set for either TX or RX.
Sleep
Receive path
Transmit path
Indeterminate
Sleep
Receive path
Transmit path
Indeterminate
TM
Switch and Mode Parameters
Receive - switch sleep
Receive
Transmit
Transmit – switch indeterminate
TM
RF Switch State
RF Mode (Wi.M868X Only)
and Wi.M868X-DP-R
8
TM
is that bit 3 (RTParam_Switch_Ext) of
TM
, you may select the mode that best
SWParam1
SWParam1
SWParam2
SWParam2
SWParam1
SWParam1
SWParam1
SWParam1
SWParam2
SWParam2
SWParam2
SWParam2
XE1203F Reg Set
XE1203F Reg Set