AK4950 Datasheet, PDF (61/106 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK/Cap-less VIDEO-AMP & mini DSP

[AK4950]
1.35V(*)
typ 100kΩ
ADC
1.35V(*)
typ 200kΩ
DAC
Line out -amp
AVDD
LIN1(RIN1) pin
AVDD
LOUT(ROUT) pin
From Jack of Apprication
Figure 45. DAC→ LOUT/ROUT path: External Line Share
(PMADC = LOPS bits = “0”, EXTC bits = “1”)
* When LOVL0 bit = “0”. 1.43V (typ) if the LOVL0 bit = “1”
■ Rch Line Output and Analog Mix Mono Input Modes Select
When PMBP bit = “0”, the ROUT/MIN pin outputs right channel signal of DAC (ROUT pin mode). When PMBP bit =
“1”, the ROUT/MIN pin becomes mono input pin (MIN pin mode).
PMLO bit
PMBP bit
ROUT/MIN pin mode
1
0
ROUT pin mode
(default)
x
1
MIN pin mode
* MIN pin mode when PMLO = PMBP bits = “1”
Table 46. ROUT/MIN pin Mode Select (x: Don’t care)
During PMBP bit = “1”, the speaker amplifier outputs input data of the MIN pin by setting BEEPS bit to “1”. The lineout
amplifier outputs input signal of the MIN pin by setting BEEPL bit to “1”. When BPM bit = “1”, Ri can control the BEEP
signal gain which is in inverse proportion to Ri resister value. Table 48 and Table 49 show the typical gain when R_i =
66kΩ. The external R_i resister is not needed when BPM bit = “0”. The total gain is dependent on MIN-Amp gain which is
set by BPLVL2-0 bits, speaker amplifier gain (SPKG1-0 bits) and stereo lineout amplifier gain (LOVL1-0 bits).
BPM bit
BEEP Mode
1
External Resistance Mode
0
Internal Resistance Mode
Table 47. BEEP Mode Setting
(default)
MS1320-E-00
- 61 -
2011/10