mc33596 Freescale Semiconductor, Inc, mc33596 Datasheet - Page 28

• Manufacturer Part Number: mc33596
• Description: Pll Tuned Uhf Receiver For Data Transfer Applications
• Manufacturer: Freescale Semiconductor, Inc

Configuration, Command, and Status Registers
Figure 19
DSREF (Data Slicer Reference) selects the data slicer reference.
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.
MODU (Modulation) sets the data modulation type.
DR[1:0] (Data Rate) configure the receiver blocks operating in base band.
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.
DME (Data Manager Enable) enables the data manager.
28
Reset Value
Bit Name
•
•
•
0 = Fixed reference (cannot be used in FSK)
1 = Adaptive reference (recommended for maximum sensitivity in OOK and FSK)
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.
0 = On/Off Keying (OOK) modulation
1 = Frequency Shift Keying (FSK) modulation
Low-pass data filter
Low-pass average filter generating the data slicer reference, if DSREF is set
Data manager
0 = standby mode
1 = other modes can be activated
0 = disabled
1 = enabled
describes configuration register 2, CONFIG2.
DR1
0
0
1
1
DSREF
Bit 7
DR0
0
0
1
0
1
FRM
Bit 6
Cut-off Frequency
0
Table 11. Base Band Parameter Configuration
Data Filter
12 kHz
24 kHz
48 kHz
6 kHz
MODU
Bit 5
Figure 19. CONFIG2 Register
0
MC33596 Data Sheet, Rev. 3
Bit 4
DR1
1
Cut-off Frequency
Average Filter
0.5 kHz
1 kHz
2 kHz
4 kHz
Bit 3
DR0
0
TRXE
Bit 2
0
Data Rate Range
Data Manager
16–22.4 kBd
8–10.6 kBd
2–2.8 kBd
4–5.6 kBd
DME
Bit 1
0
Freescale Semiconductor
SOE
Bit 0
0
Addr
$01