Data Sheet AS2522B
austriamicrosystems
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.
Default value
after reset
Address
Data
Control registers AS2522A, AS2522B
A A A A D D D D
3 2 1 0 3 2 1 0
0
0
0
0
0
0
0 Nop
1 DTMFpair
No operation. W rite to this location to get AS2522-Satus
inform ation without altering any other setting.
Frequency select
depending on Tone Generator mode
DTMF-Generator mode:
Single tone mode AS2522B ONLY
AND FSK=1 (Addr 12):
na
0000
HIGH Group
c1 c0 fHigh
0 0 1209Hz
0 1 1336Hz
1 0 1477Hz
1 1 1633Hz
LOW-Group
r1 r0 fLow
0 0 697Hz
0 1 770Hz
1 0 852Hz
1 1 941Hz
f4, c1
f3, c0
f2, r1
0
0
1
0 DTMFLevel
f0, r0
Data
f[3:0]
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Frequency
0Hz
800Hz (ring)
1067Hz (ring)
1333Hz (ring)
1300Hz (V.23)
2100Hz (V.23)
1200Hz (Bell 202)
2200Hz (Bell 202)
980Hz (V.21)
1180Hz (V.21)
1070Hz (Bell 103)
1270Hz (Bell 103)
1650Hz (V.21)
1850Hz (V.21)
2025Hz (Bell 103)
2225Hz (Bell 103)
1100
DTMF-Level 13 steps, 1dB stepsize
Data
DTMF-level LOW GROUP at pin LS
0x0
-16dBm
:
:
0xC
-4dBm
DTMF-settings
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
Single Tone frequencies if FSK=0 (Addr. 12) and RING/Beep Volum e [4]
frequ1 frequ0
V1
0
0
800Hz
0
0
1
1067Hz
0
1
0
1333Hz
1
1
1
1333Hz
1
Tone Generator m ode, single tone path
V0:
0
1
0
1
RING volume
-17.5dB
-11.5dB
-5.5dB
0dB
0
0
1
1
x
x
x
x
0101
preemph
Tone
CT1
0
1
0
0
x
x
x
CT0
x
0000
frequ1
frequ0
V1
0
1
0
1
x
x
x
V0
x
0000
0
1
1
0
x
x
x
x
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 )
Softclip-settings, Noise m onitoring
RING:
RING-path
0...OFF,
BNON:
Noise monitor
0...OFF,
SOFTRX:
Softclip RX
0...OFF,
SOFTTX:
Softclip TX
0...OFF,
DC/DC-Converter ON/OFF,Mask
ldbr:
Digital tone at RO
ldbl:
Digital tone at LO1/LO2
MASK:
Mask function
DC/DC:
DC/DC-converter
1...ON
1...ON
1...ON
1...ON
Burs
Burl
M1
M0
0000
Soft-RX
0
1
1
1
x
x
x
Soft-TX
Bnon
ring
x
0000
1...ON
1...ON
1...ON
1...ON
Revision 3.4
DC/DC
Mask
ldbr
ldbl
0...OFF,
0...OFF,
0...OFF,
0...OFF,
Page 9 of 19
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