MC33596 datasheet(28/58 Pages) FREESCALE

Part #	MC33596

Description	PLL Tuned UHF Receiver for Data Transfer Applications

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

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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

1

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

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

48 kHz

4 kHz

16–22.4 kBd

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