DSALPHA-3

Jul 09

©

2009 RF Solutions Ltd.

Page 9

ALPHA-TX

ALPHA-RX

5

．

．

．

． Data Rate Command

bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

POR

1

1

0

0

1

0

0

0

r7

r6

r5

r4

r3

r2

r1

r0

C800h

r7..r0: set data rate

BR=10000000/29/：R+1：

BR is data rate

6

．

．

．

． Power Setting Command

bit

7

6

5

4

3

2

1

0

POR

1

0

1

1

0

p2

p1

p0

B0h

p2..p0: set relative output power:

Pout=Pmax-P*3 [dBm]

Pmax is the max output power; it is related to the antenna impedance.

7

．

．

．

． Low Battery Detector and Tx bit Synchronization Command

bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

POR

1

1

0

0

0

0

1

0

dwc

0

ebs

t4

t3

t2

t1

t0

C200h

dwc：Disable wake-up timer periodical calibration

ebs：Enable TX bit synchronization function

t4..t0: Set threshold voltage of Low battery detector

Vlb=2.2+T*0.1 [V]

8

．

．

．

． Sleep Command

bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

POR

1

1

0

0

0

1

0

0

s7

s6

s5

s4

s3

s2

s1

s0

C400h

If crystal oscillator, synthesizer and power amplifier are auto-controlled, this command will close

power amplifier and synthesizer immediately, then stop crystal oscillator after S periods of CLK signal

9

．

．

．

． Wake-Up Timer Command

bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

POR

1

1

1

r4

r3

r2

r1

r0

m7

m6

m5

m4

m3

m2

m1

m0

E000h

The wake-up timer period is determined by:

For continual operation, bit ‘et’ must be cleared and set

10

．

．

．

．

Data Transmit Command

bit

7

6

5

4

3

2

1

0

1

1

0

0

0

1

1

0

This command indicate that the following data on SDI pin is to be transmitted, the transmission stops

if nSel return to hi.

11

．

．

．

．

Status Register Read Command

bit

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

POR

1

1

0

0

1

1

0

0

0

0

0

0

0

0

0

0

--