MC33592FTA Datasheet, PDF (10/28 Pages) Motorola, Inc – PLL Tuned UHF Receiver for Data Transfer Applications

Freescale Semiconductor, Inc.
CONFIGURATION REGISTERS
Figure 13 : Reading configuration registers
MCU (master)
1 Don’t care
Don’t care
ROMEO2
Don’t care
MOSI line
1
CR1
MCU (master)
CR2
CR3
ROMEO2
SCLK line
MISO line
CONFIGURATION REGISTERS
Table 4 describes the Configuration Register 1 (CR1).
Bit name
Reset value
Table 4: Configuration Register 1
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
R/W CF MOD SOE SR1 SR0 DME HE
1
1
0
1
0
1
0
0
- R/W controls the 3 registers access (read or write):
0 = Write CR1, CR2 ,CR3,
1 = Read CR1, CR2, CR3.
- CF defines the Carrier Frequency as shown onTable 5.
Table 5: Carrier Frequency selection
CF Selected Frequency
0
315MHz
1
434MHz
- MOD sets the data Modulation type:
0 = On/Off Keying (OOK) modulation,
1 = Not allowed.
- SOE enables the Strobe Oscillator:
0 = Disabled,
1 = Enabled,
Whatever SOE value has been programmed, a high level on STROBE sets the circuit into run mode.
- SR0/SR1 define the Strobe Ratio (SR) as shown on Table 6. SR is the ratio Sleep time over Run time and
Run time=T_Strobe (where T_Strobe is the Strobe oscillator period).
Table 6: Strobe Ratio selection
SR1 SR0
Strobe Ratio
0
0
3
0
1
7
1
0
15
1
1
31
10
MC33592 Technical Data
MOTOROLA
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