AK4642EN Datasheet, PDF (44/83 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4642EN]
„ Analog Mixing: Mono Input
When the PMBP bit is set to “1”, the mono input is powered-up. When the BEEPS bit is set to “1”, the input signal from
the MIN pin is output to Speaker-Amp. When the BEEPH bit is set to “1”, the input signal from the MIN pin is output to
Headphone-Amp. When the BEEPL 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 33, Table 34 and Table 35 show the typical
gain example at R_i = 20kΩ. This gain is in inverse proportion to R_i .
Ri
MIN
BEEPL
BEEPH
BEEPS
LOUT/ROUT pin
HPL/HPR pin
SPP/SPN pin
Figure 7. Block Diagram of MIN pin
LOVL bit
MIN Æ LOUT/ROUT
0
0dB
Default
1
+2dB
Table 33. MIN Input Æ LOUT/ROUT Output Gain (typ) at R_i = 20kΩ
HPG bit
MIN Æ HPL/HPR
0
−20dB
Default
1
−16.4dB
Table 34. 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 35. MIN Input Æ Speaker-Amp Output Gain (typ) at R_i = 20kΩ
MS0420-E-00
- 44 -
2005/09