Atmega128rfa1 – Rainbow Electronics ATmega128RFA1 User Manual
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121
8266A-MCU Wireless-12/09
ATmega128RFA1
Bit
3
2
1
0
NA ($158)
Resx3
Resx2
Resx1
Resx0
FTN_CTRL
Read/Write
RW
RW
RW
RW
Initial Value
1
0
0
0
This register controls the operation of the calibration loop of the filter tuning network.
•
Bit 7 – FTN_START - Start Calibration Loop of Filter Tuning Network
FTN_START = 1 initiates the calibration of the filter tuning network. When the
calibration cycle has finished after at most 25 µs the register bit is automatically reset to
0.
•
Bit 6:0 – Resx6:0 - Reserved
9.12.26 PLL_CF – Transceiver Center Frequency Calibration Control Register
Bit
7
6
NA ($15A)
PLL_CF_START
Resx6
PLL_CF
Read/Write
RW
RW
Initial Value
0
1
Bit
5
4
NA ($15A)
Resx5
Resx4
PLL_CF
Read/Write
RW
RW
Initial Value
0
1
Bit
3
2
NA ($15A)
Resx3
Resx2
PLL_CF
Read/Write
RW
RW
Initial Value
0
1
Bit
1
0
NA ($15A)
Resx1
Resx0
PLL_CF
Read/Write
RW
RW
Initial Value
1
1
This register controls the operation of the center frequency calibration loop.
•
Bit 7 – PLL_CF_START - Start Center Frequency Calibration
PLL_CF_START = 1 initiates the center frequency calibration. The calibration cycle has
finished after 35 µs (typical). The register bit is cleared immediately after finishing the
calibration.
•
Bit 6:0 – Resx6:0 - Reserved
9.12.27 PLL_DCU – Transceiver Delay Cell Calibration Control Register
Bit
7
6
5
4
NA ($15B)
PLL_DCU_START
Resx6
Resx5
Resx4
PLL_DCU
Read/Write
RW
R
RW
RW
Initial Value
0
0
1
0