AS2540Q AMSCO [austriamicrosystems AG], AS2540Q Datasheet - Page 6

• Manufacturer Part Number: AS2540Q
• Description: Remote Controlled Single-Chip-Telephone
• Manufacturer: AMSCO [austriamicrosystems AG]

Data Sheet AS2540
Serial interface
The communication principle is derived from a standard UART:
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Rx - messages
Revision 3.1
Message Format
MSB
d7
d7
X
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
Baud Rate
Start Bit
Data Bits
Parity
Stop Bit
LSB is transferred prior to MSB
d6
d6
X
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
d
d5
d5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
5
9600
1
None
1
8
d4
d4
d
1
0
0
0
0
0
0
0
1
1
1
0
1
1
1
1
0
0
0
0
0
4
d
d3
d3
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
1
0
0
0
3
d2
d2
d
1
0
1
1
0
0
1
1
0
0
1
0
0
0
1
1
0
1
0
1
1
2
d
d1
d1
0
1
0
1
0
1
0
1
0
1
1
0
0
1
0
1
0
0
1
0
1
1
LSB
d0
d0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
DTMF-dial message
Digit 0
Digit 1
Digit 2
Digit 3
Digit 4
Digit 5
Digit 6
Digit 7
Digit 8
Digit 9
Digit *
Digit #
Digit A
Digit B
Digit C
Digit D
KeyReleased
Pin-Control message
SetDPn_HIGH
SetDPn_LOW
SetMask
ResetMask
Starts DTMF dialling of digit
Starts DTMF dialling of digit
Starts DTMF dialling of digit
Starts DTMF dialling of digit
Starts DTMF dialling of digit
Starts DTMF dialling of digit
Starts DTMF dialling of digit
Starts DTMF dialling of digit
Starts DTMF dialling of digit
Starts DTMF dialling of digit
Starts DTMF dialling of digit
Starts DTMF dialling of digit
Starts DTMF dialling of digit
Starts DTMF dialling of digit
Starts DTMF dialling of digit
Starts DTMF dialling of digit
Stops Dialling
Release pin Dpn (open drain)
Force pin DPn = VSS
Force LI-Voltage to 1.2 V
austriamicrosystems
Notes
Notes
Page 6 of 18