ak4671 AKM Semiconductor, Inc., ak4671 Datasheet - Page 160

• Manufacturer Part Number: ak4671
• Description: Stereo Codec With Mic/rcv/hp-amp
• Manufacturer: AKM Semiconductor, Inc.

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MS0666-E-00
SRMXR1-0 bits
Receiver-Amp Output
PML/RO1 bits
L1VL2-0 bits
(Addr:08H, D2-0)
(Addr:15H, D7-6)
(Addr:1BH, D7-0)
(Addr:0FH, D1-0)
OVR7-0 bits
(Addr:0FH, D5)
(Addr:0AH, D0)
(Addr:18H, D3)
(Addr:0FH, D2)
(Addr:53H, D1)
(Addr:00H, D7)
PMSRB bit
PMDAR bit
LOPS1 bit
DACR bit
RCP pin
RCN pin
<Example>
RCV bit
At first, clocks should be supplied according to
should be powered-up in consideration of PLLBT lock time.
(1) Set up the path of “SDTIA
(2) Enable 5-band Equalizer: EQ bit = “0”
(3) Set up the output digital volume (Addr: 1BH)
(4) Enter power-save mode of Receiver-Amp: LOPS1 bit = “0”
(5) Power-up SRC-B, DAC and Receiver-Amp: PMSRB bit = PMDAR = PMLO1 = PMRO1 bits = “0” → “1”
(6) Exit power-save mode of Receiver-Amp: LOPS1 bit = “1”
(7) Enter power-save mode of Receiver-Amp: LOPS1 bit: “0”
(8) Power-down SRC-B, DAC and Receiver-Amp: PMSRB bit = PMDAR = PMLO1 = PMRO1 bits = “1” → “0”
(9) Disable 5-band Equalizer: EQ bit = “1”
(10) Disable the path of “DAC
(11) Exit power-save mode of Receiver-Amp: LOPS1 bit = “1”
EQ bit
“1”, RCV bit = “0”
Set up analog volume for Receiver-Amp (Addr: 08H, L1VL2-0 bits)
When OVOLC bit is “1” (default), OVL7-0 bits set the volume of both channels. After DAC is powered-up,
the digital volume changes from default value (0dB) to the register setting value by the soft transition.
RCN pin rise up to VCOM voltage after PMLO1 and PMRO1 bits are changed to “1”.
LOPS1 bit should be set to “0” after PCN pin rise up. Receiver-Amp goes to normal operation by setting
LOPS1 bit to “0”.
Receiver-Amp becomes to power-down mode.
LOPS1 bit should be set to “0” after Receiver-Amp power-down.
(Phone Call Rx: SDTIA → PCM I/F A → SRC-B → EQ → DATT → DACR → RCP/RCN)
101
18H
00
0
(1)
(2)
(3)
“1”
(4)
Figure 125. Receiver-Amp Output Sequence
(5)
Receiver-Amp”: DACR bit = “1”
>1 ms
DAC
(6)
Normal Output
Receiver-Amp”: SRMXR1-0 bits = “00”
100
28H
01
1
“1” (Boost amount is selected by Addr = 50H-52H.)
“0”
“Clock Set
- 160 -
(7)
Up” sequence. Also, SRC-B, DAC and Receiver-Amp
(8)
(9)
(10)
“1”
“0”
“0”
“1”
0
(11)
“0”
Example:
RCV Volume Level: 0dB
Sampling Frequency: 8kHz
Digital Volume Level: −8dB
PCM I/F A: Slave Mode
PCM I/F A Format : Linear, Short Frame (ADC & DAC)
5 band EQ: Enable
(1) Addr:08H, Data:B4H
(3) Addr:1BH, Data:28H
(4) Addr:0FH, Data:24H
(6) Addr:0FH, Data:23H
(7) Addr:0FH, Data:27H
(2) Addr:18H, Data:0AH
(5) Addr:53H, Data:06H
(8) Addr:53H, Data:04H
(9) Addr:18H, Data:02H
(10) Addr:0AH, Data:00H
(11) Addr:0FH, Data:20H
Addr:15H, Data:40H
Addr:0AH, Data:01H
Addr:0FH, Data:20H
Addr:00H, Data:81H
Addr:0FH, Data:27H
Addr:00H, Data:01H
Addr:0FH, Data:24H
Phone Call
“01”, DACR bit = “0”
[AK4671]
2007/10