AK4537 Datasheet, PDF (61/76 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ Stereo CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4537]
CONTOROL SEQUENCE
„ Power up
Upon power-up, bring the PDN pin = “L”. Initialize the internal registers to default values after the PDN pin = “H”. Set
the following registers to establish the initial condition.
Pow er Supply
PDN pin
PMVCM bit
(Addr:00H, D7)
MOUT2 bit
(Addr:02H, D0)
(2)
(3)
(4)
ALCS bit
(Addr:02H, D1)
DAHS bit
(Addr:03H, D7)
DIF1-0 bits
(Addr:04H, D1-0)
(5)
(6)
10
XX
BF bit
0
X
(Addr:04H, D2)
PLL1-0 bits
00
XX
(Addr:04H, D7-6)
E xam p le :
A udio I/F Fo rm at : I²S
B IC K frequency at M aster M o de : 64fs
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
(1 ) P ow er S u p p ly
(2 ) P D N p in = “L ” → “H ”
(3 ) A d d r:0 0 H , D ata 8 0 H
(4) A d d r:0 2H , D ata 0 3H
(5) A d d r:0 3H , D ata 83 H
(6) A d d r:0 4H , D ata 4 2H
Figure 48. Power Up Sequence
<Example>
(1) Power Supply
(2) PDN pin = “L” → “H”
“L” time of 150ns or more is needed to reset the AK4537.
(3) Power up VCOM : PMVCM bit = “0” → “1”
VCOM should first be powered up before the other block operates.
(4) Set up register 02H : MOUT2 bit = ALCS bit = “0” → “1”
Set the MOUT2 and ALCS bits to “1” when using the Speaker-amp.
(5) Set up register 03H : HPL bit = HPR bit = “1” → “0”, DAHS bit = “0” → “1”
(6) Set up register 04H
• DIF1-0 bits set the audio interface format.
• BF bit sets BICK output frequency in master mode.
• PLL1-0 bits set MCLK input frequency in PLL mode.
MS0202-E-04
- 61 -
2005/04