AK2346B Datasheet, PDF (16/31 Pages) Asahi Kasei Microsystems – Two-way Radio Audio Processor

ASAHI KASEI
[AK2346B]
Note 1: TXIN to EXPOUT path is available by setting TXRX=0 and RXSW=1 in register.
However, Scrambler/Descrambler circuit does not work properly on this setting, so please set
PCONT=1 (disable). To set RXSW=0 makes EXPOUT pin mute in operation.
Note 2: RXIN to MOD path is available by setting TXRX=1 and TXSW2/TXSW1=1/0 in register.
However, Scrambler/Descrambler circuit does not work properly on this setting, so please set
PCONT=1 (disable). To set TXSW2/TXSW1=1/1 makes MOD pin mute in operation.
Note 3: Please set a gain level properly in each circuit block according to level diagram in page 14.
Note 4: RXLPFO pin does not be controlled by setting RXSW=0. It is normally active in RX mode.
2.2) Control Register 2
Address
Data
A2
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
0
0
1
-
-
TC
EM PCONT SPL MSKSL FCLN
Reset
-
-
1
1
1
1
0
0
Data
Function
TC COMPANDOR
SPL
Splatter
cut-off frequency
MSKSL MODEM data rate
FCLN MODEM flame detect
0
OFF (disable)
Operation
1
ON (enable)
2.55kHz
3.0kHz
2400bps
ON (enable)
1200bps
OFF (disable)
Notes
EM PCONT
1
1
0
1
0/1
0
Operation
Emphasis : ON (enable) Scrambler : OFF(disable)
Emphasis : OFF(disable) Scrambler : OFF(disable)
Emphasis : OFF(disable) Scrambler : ON (enable)
Notes
2.3) Volume Register 1
Address
A2
A1
A0
0
1
0
Reset
VR12
0
0
0
0
1
1
1
1
D7
D6
D5
-
-
-
-
-
-
VR11
0
0
1
1
0
0
1
1
Data
D4
D3
-
-
-
-
D2
VR12
1
D1
VR11
0
D0
VR10
0
VR10
0
1
0
1
0
1
0
1
VR1 Gain (dB)
-6.0
-4.5
-3.0
-1.5
0.0
+1.5
+3.0
+4.5
MS1409-E-00
- 16 -
2012/05