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MRF49XA-I/T Datasheet(PDF) 62 Page - Microchip Technology |
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MRF49XA-I/T Datasheet(HTML) 62 Page - Microchip Technology |
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62 / 102 page  MRF49XA DS70590C-page 62 Preliminary © 2009-2011 Microchip Technology Inc. From PMCREG, the following points are applicable when using the bit functionalities: • The chip enters Receive mode if both the TXCEN and RXCEN bits are set. • FSK/DATA/FSEL input is equipped with an internal pull-up resistor. To achieve minimum current consumption, do not pull this input to logic low in Sleep mode. • To enable the RF synthesizer, the crystal oscillator must be turned on. • To turn on the baseband circuits, the RF synthesizer and the crystal oscillator must be enabled. • Setting the RXCEN bit automatically turns on the crystal oscillator, synthesizer, baseband circuits and RF front end. • Setting the TXCEN bit automatically turns on the crystal oscillator, synthesizer and RF power amplifier. The clock tail and automatic crystal enable/disable features help in reducing the power consumption and are discussed in detail in Section 3.4, Crystal Oscillator and Clock Output. The registers associated with power management are: •STSREG (see Register 2-1) • GENCREG (see Register 2-2) • RXCREG (see Register 2-7) • PMCREG (see Register 2-13) |
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