CONFIGURATION REGISTERS

10

MC33592 Technical Data

MOTOROLA

Figure 13 : Reading configuration registers

CONFIGURATION REGISTERS

Table 4 describes the Configuration Register 1 (CR1).

Table 4: Configuration Register 1

- 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

- 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

Table 6: Strobe Ratio selection

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

CF

Selected Frequency

0

315MHz

1

434MHz

SR1

SR0

Strobe Ratio

00

3

0

1

7

10

15

11

31

MOSI line

Don’t care

Don’t care

Don’t care

1

SCLK line

MCU (master)

ROMEO2

MCU (master)

ROMEO2

MISO line

CR2

CR3

CR1

1

Freescale Semiconductor, Inc.

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