MC33594

MOTOROLA SEMICONDUCTORS PRODUCTS

11

revision 1.1, 5 February 2002

© Motorola, Inc., 2002.

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 = 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

Table 6: Strobe Ratio selection

- DME enables the Data Manager:

0 = Disabled,

1 = Enabled (to be combined with MOD=1).

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

Table 8 describes the Configuration Register 3 (CR3).

Table 8: Configuration Register 3

bit 7bit 6bit 5bit 4bit 3bit 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

bit 7bit 6bit 5bit 4bit 3bit 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

bit 7bit 6bit 5bit 4bit 3bit 2

bit 1

bit 0

Bit name

DR1

DR0

MG

MS

PG

-

-

-

Reset value

1

0

0

0

0

0

0

0

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com