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MC33596 Datasheet(PDF) 28 Page - Freescale Semiconductor, Inc |
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MC33596 Datasheet(HTML) 28 Page - Freescale Semiconductor, Inc |
28 / 58 page MC33596 Data Sheet, Rev. 3 Configuration, Command, and Status Registers Freescale Semiconductor 28 Figure 19 describes configuration register 2, CONFIG2. DSREF (Data Slicer Reference) selects the data slicer reference. 0 = Fixed reference (cannot be used in FSK) 1 = Adaptive reference (recommended for maximum sensitivity in OOK and FSK) In the case of FSK modulation (MODU = 1), DSREF must be set. FRM (Frequency Register Manager) enables either a user friendly access to one frequency register or a direct access to the two frequency registers. 0 = The carrier frequency and the FSK deviation are defined by the F register 1 = The local oscillator frequency and the two carrier frequencies are defined by two frequency registers, F and FT. MODU (Modulation) sets the data modulation type. 0 = On/Off Keying (OOK) modulation 1 = Frequency Shift Keying (FSK) modulation DR[1:0] (Data Rate) configure the receiver blocks operating in base band. • Low-pass data filter • Low-pass average filter generating the data slicer reference, if DSREF is set • Data manager If the data manager is disabled, the incoming signal data rate must be lower than or equal to the data manager maximum data rate. TRXE (Receiver Enable) enables the whole receiver. 0 = standby mode 1 = other modes can be activated DME (Data Manager Enable) enables the data manager. 0 = disabled 1 = enabled Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Addr Bit Name DSREF FRM MODU DR1 DR0 TRXE DME SOE $01 Reset Value 0 0 0 1 0 0 0 0 Figure 19. CONFIG2 Register Table 11. Base Band Parameter Configuration DR1 DR0 Data Filter Cut-off Frequency Average Filter Cut-off Frequency Data Manager Data Rate Range 0 0 6 kHz 0.5 kHz 2–2.8 kBd 0 1 12 kHz 1 kHz 4–5.6 kBd 1 0 24 kHz 2 kHz 8–10.6 kBd 1 1 48 kHz 4 kHz 16–22.4 kBd |
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