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Freescale Semiconductor, Inc.
MC33593
CONFIGURATION REGISTERS
Table 4 describes the Configuration Register 1 (CR1).
Table 4: Configuration Register 1
bit 7 bit 6 bit 5 bit 4 bit 3 bit 2
bit 1
bit 0
Bit name
R/W
CF MOD SOE SR1 SR0
DME
HE
Reset value
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 Not allowed
1
868MHz
- MOD sets the data Modulation type:
0 = On/Off Keying (OOK) modulation,
1 = Frequency Shift Keying (FSK) modulation.
- 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
- DME enables the Data Manager:
0 = Disabled,
1 = Enabled.
Data are output on MOSI and the associated clock on SCLK.
- HE defines if a Header word is present (the bit HE is only active if DME=1):
0 = No header,
1 = Header.
Configuration Register 2 (CR2) defines the Identifier (ID) word content. The bits will be Manchester coded.
Table 7: Configuration Register 2
bit 7 bit 6 bit 5 bit 4 bit 3
bit 2
bit 1
bit 0
Bit name
ID7 ID6 ID5 ID4 ID3
ID2
ID1
ID0
Reset value
0
0
0
0
0
0
0
0
Table 8 describes the Configuration Register 3 (CR3).
Table 8: Configuration Register 3
bit 7 bit 6 bit 5 bit 4 bit 3
bit 2
bit 1
bit 0
Bit name
DR1 DR0 MG MS PG
-
-
-
Reset value
1
0
0
0
0
0
0
0
For More Information On This Product,
Go to: www.freescale.com
? Motorola, Inc., 2002.
MOTOROLA SEMICONDUCTORS PRODUCTS
11
revision 7.0, 5 February 2002
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