MC33591FTA Просмотр технического описания (PDF) - Motorola => Freescale

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MC33591FTA

PLL Tuned UHF Receiver for Data Transfer Applications

Motorola => Freescale 

CONFIGURATION REGISTERS

- 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 = 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=TStrobe (where TStrobe 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.

Bit name

Reset value

Table 7: Configuration Register 2

bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0

ID7 ID6 ID5 ID4 ID3 ID2 ID1 ID0

0

0

0

0

0

0

0

0

Table 8 describes the Configuration Register 3 (CR3).

Table 8: Configuration Register 3

Bit name

bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0

DR1 DR0 MG MS PG

-

-

-

Reset value

1

0

0

0

0

0

0

0

- DR0/DR1 define the Data Rate (before Manchester coding) as shown onTable 9.

MOTOROLA

MC33591 Technical Data

11

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