Rainbow-electronics ATmega128RFA1 Instrukcja Użytkownika Pobierz pdf (Strona 121)

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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

• 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

1 2 ... 116 117 118 119 120 121 122 123 124 125 126 ... 523 524

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