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
A1
Data
A2
0
A0
1
D7
-
D6
-
D5
TC
1
D4
EM
1
D3
D2
SPL
1
D1
MSKSL
0
D0
FCLN
0
0
PCONT
1
-
-
Reset
Operation
Data
TC
Function
Notes
0
1
COMPANDOR
OFF (disable)
ON (enable)
Splatter
cut-off frequency
SPL
2.55kHz
3.0kHz
MSKSL MODEM data rate
2400bps
1200bps
MODEM flame detect
FCLN
ON (enable)
OFF (disable)
Notes
Operation
EM
1
PCONT
1
1
0
Emphasis : ON (enable)
Emphasis : OFF(disable)
Emphasis : OFF(disable)
Scrambler : OFF(disable)
Scrambler : OFF(disable)
Scrambler : ON (enable)
0
0/1
2.3) Volume Register 1
Address
Data
A2
0
A1
1
A0
0
D7
-
D6
-
D5
-
D4
-
D3
-
D2
VR12
1
D1
D0
VR10
0
VR11
0
-
-
-
-
-
Reset
VR12
VR11
VR10
VR1 Gain (dB)
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
-6.0
-4.5
-3.0
-1.5
0.0
+1.5
+3.0
+4.5
MS1409-E-00
2012/05
- 16 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
