[AK4679]
CONTROL SEQUENCE (PCM)
■ PCM I/F A(Baseband) to PCM I/F B(Bluetooth)
Example:
PCM I/F A/B Format: Linear, Long Frame
MSBSA=BCKPA= “0”, MSBSB=BCKPB=”0”
PCM I/F A Sampling Frequency: 16kHz
PCM I/F B Sampling Frequency: 44.1kHz
BIVOL: -6dB, DATT-C: -6dB
Power Supply
PDNA pin
(1)
(6)
(2)
(3)
(1) Power Supply & PDN pin = “L” Æ “H”
PMVCM bit
(Addr:00H, D0)
(4)
(5)
PMOSC bit
PMPCMA/B bit
PMSRx bits
(Addr:1FH, D6-0)
(2)Addr:00H, Data:00H
Addr:18H, Data:0BH
Addr:20H, Data:01H
Addr:21H, Data:01H
Addr:24H, Data:18H
Addr:26H: Data:02H
Addr:27H, Data:07H
Addr:28H, Data:00H
SYNCA/B pins
BICKA/B pins
Input
164/fs2
164/fs3
SDTOA pin
"0" data
"0" data
Normal State
"0" data
"0" data
(3) Addr:00H, Data:01H
(4) Addr:1FH, Data:7FH
Phone Call
Normal State
SDTOB pin
(5) Addr:1FH, Data:00H
(6) Addr:00H, Data:00H
Note: PMSRx bit means PMSRAI, PMSRAO, PMSRBI and PMSRBO bits
Figure 161. Sequence of PCM I/F A to PCM I/F B
(Baseband RX to Bluetooth TX: SDTIAÆPCM I/F AÆSRCAIÆDATT-CÆMIX3ÆPCM I/F BÆSDTOB &
Bluetooth RX to Baseband TX: SDTIBÆPCM I/F BÆBIVOLÆMIX2AÆMIX2CÆSRCAOÆPCM I/F AÆSDTOA)
<Example>
(1) After Power Up, PDNA pin = “L” Æ “H”. “L” time of 1.5μs or more is needed to reset the AK4679.
(2) Dummy command (Addr:00H, Data:00H) must be executed before control register is set.
OVTMB, BIV2-0, SDOA/BD, FMTA/B1-0, LAWA/B1-0, BCKPA/B, MSBSA/B, CVL6-0, MX2A1-0,
MX2C1-0, MXSB2-0, SBMX1-0 bits should be set during this period.
(3) Power Up VCOM: PMVCM bit = “0” Æ “1”
VCOM should first be powered up before the other block operates.
(4) Power Up Internal Oscillator, SRCAI, SRCAO, SRCBI, SRCBO, PCM I/F A port and PCM I/F B port.
PMSRBO=PMSRBI=PMPCMB=PMOSC=PMSRAO=PMSRAI=PMPCMA bits: “0” Æ “1”
SDTOA(SDTOB) outputs data after power-down state is released by inputting SYNCA(SYNCB). This initial
of SRCAO(SRCBO) is 164/fs2(164/fs3) for SDTOA(SDTOB) output enable after power-down state is
released by inputting SYNCA(SYNCB).
(5) Power down Internal Oscillator, SRCAI, SRCAO, SRCBI, SRCBO, PCM I/F A port and PCM I/F B port.
PMSRBO=PMSRBI=PMPCMB=PMOSC=PMSRAO=PMSRAI=PMPCMA bits: “1” Æ “0”
(6) Power Down VCOM: PMVCM bit = “1” Æ “0”
MS1402-E-06
2013/02
- 215 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
