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Atmega128rfa1 – Rainbow Electronics ATmega128RFA1 User Manual

Page 121

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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