AK4649 Datasheet, PDF (83/96 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK-AMP

[AK4649]
2. PLL Slave Mode (LRCK or BICK pin)
Power Supply
PDN pin
PMVCM bit
(Addr:00H, D6)
PMPLL bit
(Addr:01H, D0)
LRCK pin
BICK pin
Internal Clock
(1)
(2) (3)
Example:
Audio I/F Format : MSB justified (ADC & DAC)
PLL Reference clock: BICK
BICK frequency: 64fs
Sampling Frequency: 44.1kHz
4f₍s₁o₎ f_{Power Supply & PDN pin = “L” Æ “H”}
(2) Addr:04H, Data:32H
Addr:05H, Data:27H
Input
(4)
(3) Addr:00H, Data:40H
(5)
Figure 56. Clock Set Up Sequence (2)
(4) Addr:01H, Data:01H
<Example>
(1)After Power Up: PDN pin “L” → “H”
“L” time of 150ns or more is needed to reset the AK4649.
(2)DIF1-0, FS3-0 and PLL3-0 bits must be set during this period.
(3)Power Up VCOM: PMVCM bit = “0” → “1”
VCOM must first be powered up before the other block operates.
(4)PLL starts after the PMPLL bit changes from “0” to “1” and PLL reference clock (LRCK or BICK pin) is
supplied. PLL lock time is 160ms (max) when LRCK is a PLL reference clock. And PLL lock time is 2ms (max)
when BICK is a PLL reference clock.
(5)Normal operation stats after that the PLL is locked.
MS1023-E-01
- 83 -
2010/08