AK2363 Datasheet, PDF (20/33 Pages) Asahi Kasei Microsystems – Radio Signaling LSI

ASAHI KASEI
[AK2363]
2.4) DTMF register 2
Address
A3 A2 A1 A0
0
0
1
1
Initial value
Data
D7
D6
D5
D4
D3
D2
D1
D0
-
STDPGA1 STDPGA0 DTMFSL AGCSW1 AGCSW0 PGA1
PGA0
-
0
0
1
0
1
0
0
Note
STDPGA1
STDPGA0
PGA gain
(dB)
0
0
0
0
1
+4
1
0
+8
1
1
+12
When AGC circuit is enable, automatic set PGA gain can be monitored by STDPGA[1:0] register.
This register is read-only and synchronized with the rising edge on the DTMF signal detection pin:
STD.
Data
Item
DTMFSL
DTMF input
switching
Function
0
DTMFIN pin input
1
RXIN pin input
Remarks
AGCSW1 AGCSW0
Function
0
0
AGC circuit Off (Disable) PGA gain can be set with PGA[1:0] register.
AGC circuit On (Enable) PGA gain can be monitored by
0
1
STDPGA[1:0] register.
The register data is renewal at every DTMF
detection.
AGC circuit Off (Disable) PGA gain may be set with the latest
1
0
STDPGA[1:0] register, then AGC is off.
PGA gain can not be set with PGA[1:0].
1
1 Not used
Remarks
Initial value
PGA1
0
0
1
1
PGA0
0
1
0
1
PGA gain
(dB)
0
+4
+8
+12
Note When the AGC circuit is disabled, the gain of the PGA circuit can be set manually with
PGA[1:0].
MS0583-E-01
- 20 -
2008/06