ak4640 ETC-unknow, ak4640 Datasheet - Page 63

• Manufacturer Part Number: ak4640
• Description: 16bit Codec With /hp/spk-ampl
• Manufacturer: ETC-unknow

ASAHI KASEI
Upon power-up, bring the PDN pin = “L”. Initialize the internal registers to default values after the PDN pin = “H”. When
the power supplies are partially powered OFF, the AK4640 must be reset by bringing PDN pin “L” after these power
supplies are powered ON again. Set the following registers to establish the initial condition.
MS0273-E-00
Pow er Supply
(Addr:03H, D1-0)
(Addr:04H, D1-0)
(Addr:04H, D7-6)
Power up
PLL1-0 bits
<Example>
PMVCM bit
(Addr:00H, D7)
(Addr:02H, D0)
(Addr:02H, D1)
(Addr:03H, D7)
DIF1-0 bits
(Addr:04H, D2)
MOUT2 bit
HPL/R bits
DAHS bit
ALCS bit
PDN pin
BF bit
(1) Power Supply
(2) PDN pin = “L” → “H”
(3) Power up VCOM : PMVCM bit = “0” → “1”
(4) Set up register 02H : MOUT2 bit = ALCS bit = “0” → “1”
(5) Set up register 03H : HPL bit = HPR bit = “1” → “0”, DAHS bit = “0” → “1”
(6) Set up register 04H
“L” time of 150ns or more is needed to reset the AK4640.
VCOM should first be powered up before the other block operates.
Set the MOUT2 and ALCS bits to “1” when using the Speaker-amp.
• DIF1-0 bits set the audio interface format.
• BF bit sets BICK output frequency in master mode.
• PLL1-0 bits set MCKI input frequency in PLL mode.
(2)
10
00
0
(3)
(4)
(5)
(6)
Figure 44. Power Up Sequence
CONTOROL SEQUENCE
XX
XX
X
- 63 -
E x a m p le :
A ud io I/F F o rm a t : I
B IC K f re q u e nc y a t M a s te r M o d e : 6 4 f s
Inp ut M a s te r C lo c k S e le c t a t P L L M o d e : 1 1 .2 8 9 6 M H z
(2 ) P D N p in = “L ” → “H ”
(4 ) A d d r:0 2 H , D a ta 0 3 H
(5 ) A d d r:0 3 H , D a ta 8 0 H
(6 ) A d d r:0 4 H , D a ta 4 2 H
(3 ) A d d r:0 0 H , D a ta 8 0 H
(1 )
P o w e r S u p p ly
2
S
[AK4640]
2004/03