AK4695 Datasheet, PDF (101/107 Pages) Asahi Kasei Microsystems – 24bit 4ch CODEC with MIC/HP/SPK/LINE-AMP

[AK4695]
■ Headphone-Amp Output
FS3-0 bits
(Addr:00H, D3-0)
DACAST bit
(Addr:02H, D3)
DALB7-0 bits
(Addr:0FH)
XXXX
(1)
(2)
84H
(3)
0010
70H
Example:
Audio I/F Format: MSB justified
Sampling Frequency: 48KHz
Digital Volume B: -10dB
Programmable Filter, DRC: OFF
(1) Addr:00H, Data:22H
(2) Addr:02H, Data:88H
DAC Path
(Addr:12H)
PMDACB bit
(Addr:1BH, D1)
PMHPL/R bits
(Addr:1BH, D5-4)
HPL pin
HPR pin
32H
(4)
(5)
max.
26ms
12H
(6)
(3) Addr:0FH, Data:70H
(4) Addr:12H, Data:12H
(5) Addr:1BH, Data:12H
Playback
(6) Addr:1BH, Data:00H
Figure 59. Headphone-Amp Output Sequence
<Example>
At first, clocks should be supplied according to “Clock Set Up” sequence.
(1) Set up the sampling frequency (FS3-0 bits).
Headphone-Amp and DACB must be powered-up in consideration of VCOM rise up time.
(2) Set up the stabilization of Headphone-amp offset: DACAST bit = “0”  “1”
(3) Set up the digital output volume B (Addr = 0FH)
(4) Set up the path of SDTI → DACB → Headphone-Amp: DASEL1-0 bits = “00”, DRCENB bit = “1” → “0”
(5) Power up DACB and Headphone-Amp: PMDACB = PMHPL = PMHPR bits = “0” → “1”
When PMHP bits= “1”, the charge pump circuit is powered-up. The power-up time of Headphone-Amp block is
26ms (max)
(6) Power down DACB and Headphone-Amp: PMDAC = PMHPL = PMHPR bits = “1”  “0”
MS1463-E-01
- 101 -
2014/12