CMOSTEK CMT2157AW, Руководство пользователя

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CMT2157AW
Rev 0.8 | Page 13/31 www.hoperf.com
Table 9. Modulation, Frequency, Deviation and Symbol Rate
Parameter Value Unit
Modulation (G)FSK/OOK -
Frequency 240 to 960 MHz
Deviation 1 to 200 kHz
Frequency Resolution (F
RF
≤
480 MHz) 198 Hz
Frequency Resolution (F
RF
> 480 MHz) 397 Hz
Symbol Rate (FSK/GFSK) 0.5 to 100 ksps
Symbol Rate (OOK) 0.5 to 40 ksps
5.3 Embedded EEPROM and RFPDK
The RFPDK (RF Products Development Kit) is a very user-friendly software tool delivered for the user configuring the
CMT2157AW in the most intuitional way. The user only needs to fill in/select the proper value of each parameter and click the
“Burn” button to complete the chip configuration. No register access and control is required in the application program. See
figure below for the accessing of the EEPROM and Table 10 for the summary of all the configurable parameters of the
CMT2157AW on the RFPDK.
CMT2157AW
Interface
CMOSTEK USB
Programmer
CLK
DATA
RFPDK
EEPROM
Figure 12. Accessing Embedded EEPROM
For more details of the CMOSTEK USB Programmer and the RFPDK, please refer to “AN113 CMT2150A/2250(1)A One-Way
RF Link Development Kits User’s Guide”. For the detail of CMT2157AW configurations with the RFPDK, please refer to
“AN142 CMT2157A Configuration Guideline”.
Table 10. Configurable Parameters in RFPDK
Category Parameters Descriptions Default Mode
RF Settings
Frequency
To input a desired transmitting radio frequency in
the range from 240 to 960 MHz. The step size is
0.001 MHz.
868.35 MHz
Basic
Advanced
Modulation The option is FSK or GFSK and OOK. FSK
Basic
Advanced
Tx Power
To select a proper transmitting output power from
-10 dBm to +14 dBm, 1 dBm margin is given
above +13 dBm.
+13 dBm
Basic
Advanced
Xtal Cload
On-chip XOSC load capacitance options: from 10
to 22 pF.
15.00 pF
Basic
Advanced
Symbol Rate
To determines the symbol rate of the transmitted
data: from 0.5 to 100 ksps in (G)FSK mode and
0.5 to 40 ksps in OOK mode.
2.4
Basic
Advanced