AK4643 Datasheet, PDF (55/104 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP/RCV/SPK-AMP

ASAHI KASEI
[AK4643]
„ Analog Mixing: Mono Input (MIN pin)
When AIN3 bit = “0”, MIN pin is used as mono input for analog mixing. When the PMMIN bit is set to “1”, the mono
input is powered-up. When the MINS bit is set to “1”, the input signal from the MIN pin is output to Speaker-Amp. When
the MINH bit is set to “1”, the input signal from the MIN pin is output to Headphone-Amp. When the MINL bit is set to
“1”, the input signal from the MIN pin is output to the stereo line output amplifier. The external resister Ri adjusts the
signal level of MIN input. Table 45, Table 47 and Table 48 show the typical gain example at R_i = 20kΩ. This gain is in
inverse proportion to R_i .
Ri
MIN
MINL
MINH
MINS
LOUT/RCP pin,
ROUT/RCN pin
HPL, HPR pin
SPP, SPN pin
Figure 43 Block Diagram of MIN pin
LOVL bit
MIN Æ LOUT/ROUT
0
0dB
Default
1
+2dB
Table 45. MIN Input Æ LOUT/ROUT Output Gain (typ) at R_i = 20kΩ
LOVL bit
MIN Æ RCP/RCN
0
0dB
Default
1
+2dB
Table 46. MIN Input Æ RCP/RCN Output Gain (typ) at R_i = 20kΩ
HPG bit
MIN Æ HPL/HPR
0
−20dB
Default
1
−16.4dB
Table 47. MIN Input Æ Headphone-Amp Output Gain (typ) at R_i = 20kΩ
SPKG1-0 bits
MIN Æ SPP/SPN
ALC bit = “0”
ALC bit = “1”
00
+4.43dB
+6.43dB
Default
01
+6.43dB
+8.43dB
10
+10.65dB
+12.65dB
11
+12.65dB
+14.65dB
Table 48. MIN Input Æ Speaker-Amp Output Gain (typ) at R_i = 20kΩ
MS0476-E-01
- 55 -
2006/10