as2522bq austriamicrosystems, as2522bq Datasheet - Page 7

• Manufacturer Part Number: as2522bq
• Description: Telephone Line Interface And Speakerphone Circuit
• Manufacturer: austriamicrosystems

Data Sheet AS2522B
Serial Interface
Registers
The settings of the AS2522 are stored in 16 registers. Each
register has 4 bit data width. Writing data into the AS2522 also
causes the sending of the AS2522 status information on Pin D0.
This information consists of the DC-current information (from the
Line Loss Compensation circuit) and the status of the power-on
reset circuit to test if AS2522 has already powered up.
Power on reset information in Statusbits D1 and D0
DC-current information in Statusbits D7 – D2
Revision 3.4
LLC5
D7
D1
0
0
1
1
000000
000001
000011
000111
001111
011111
111111
D[7:2]
LLC4
D6
D0
0
1
0
1
AS2522 is in POR state
AS2522 is active
LLC3
D5
LLC-bit LO
LLC2
20-26mA
26-32mA
32-38mA
38-44mA
44-50mA
D4
<20mA
>50mA
LLC1
D3
LLC0
D2
LLC-bit HI
45-51mA
51-57mA
57-63mA
63-69mA
69-75mA
xPOR
<45mA
>75mA
D1
POR
D0
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