Data Sheet AS2522B

Revision 3.4

Page 9 of 19

Serial interface Registers

The following table shows the content of the 16 control registers.

For a detailed description of the commands see Application note AN522.

Control registers AS2522A, AS2522B

Default value

after reset

AAAA DDDD

32103210

0000 Nop

No operation. W rite to this location to get AS2522-Satus

inform ation without altering any other setting.

na

0001 DTMFpair

Frequency select depending on Tone Generator m ode

0000

DTMF-Generator mode:

Single tone mode AS2522B ONLY

AND FSK=1 (Addr 12):

HIGH Group

LOW-Group

Data

c1 c0

fHigh

r1 r0

fLow

f[3:0] Frequency

0

0

1209Hz

0

0

697Hz

0000

0Hz

0

1

1336Hz

0

1

770Hz

0001

800Hz

(ring)

1

0

1477Hz

1

0

852Hz

0010

1067Hz

(ring)

1

1

1633Hz

1

1

941Hz

0011

1333Hz

(ring)

0100

1300Hz

(V.23)

0101

2100Hz

(V.23)

0110

1200Hz

(Bell 202)

0111

2200Hz

(Bell 202)

1000

980Hz

(V.21)

1001

1180Hz

(V.21)

1010

1070Hz

(Bell 103)

1011

1270Hz

(Bell 103)

1100

1650Hz

(V.21)

1101

1850Hz

(V.21)

1110

2025Hz

(Bell 103)

1111

2225Hz

(Bell 103)

0010 DTMFLevel

DTMF-Level

13 steps, 1dB stepsize

1100

Data

DTMF-level LOW GROUP at pin LS

0x0

-16dBm

::

0xC

-4dBm

0011

xxxx

DTMF-settings

0101

Tone:

DTMF-signal path

0...OFF,

1...ON

preemph: DTMF-preempahsis

0...2.2dB, 1…3.2dB

CT1 CT0: @RO

@LO1/LO2

0

0

-36dB

-15dB

DTMF-confidence level

0

1

-30dB

-9dB

rel. to pin LS

1

0

-24dB

-3dB

1

1

-18dB

+3dB

0100

xxxx

Single T one frequencies if FSK=0 (Addr. 12)

and RING/Beep Volum e [4]

0000

frequ1 frequ0

V1 V0:

RING volume

0

0

800Hz

0

0

-17.5dB

0

1

1067Hz

0

1

-11.5dB

1

0

1333Hz

1

0

-5.5dB

111333Hz

1

1

0dB

0101

xxxx

Tone Generator m ode, single tone path

0000

BURS: Analog tone at RO

0...OFF,

1...ON

BURL: Analog tone at LO1/LO2

0...OFF,

1...ON

M1 M0: Tone generator mode select

0

0

Tone generator OFF

0

1

DTMF generator mode

1

0

Single tone Analog mode

1

1

Single tone Digital mode ( RING )

0110

xxxx

Softclip-settings, Noise m onitoring

0000

RING:

RING-path

0...OFF,

1...ON

BNON:

Noise monitor

0...OFF,

1...ON

SOFTRX: Softclip RX

0...OFF,

1...ON

SOFTTX: Softclip TX

0...OFF,

1...ON

0111

xxxx

DC/DC-Converter ON/OFF,Mask

0000

ldbr: Digital tone at RO

0...OFF,

1...ON

ldbl: Digital tone at LO1/LO2 0...OFF,

1...ON

MASK: Mask function

0...OFF,

1...ON

DC/DC: DC/DC-converter

0...OFF,

1...ON

Address

Data