ak4671 AKM Semiconductor, Inc., ak4671 Datasheet - Page 101

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

a) PLLBT reference clock: SYNCA or BICKA pin
The PLLBT circuit generates the required clock for PCM I/F from SYNCA or BICKA. Generated clocks are output via
SYNCB and BICKB pins.
b) PLLBT reference clock: SYNCB or BICKB pin
The PLLBT circuit generates the required clock for PCM I/F from SYNCB or BICKB. Generated clocks are output via
SYNCA and BICKA pins.
PLLBT should always be powered-up (PMPCM bit = “1”) whenever SRC-A or SRC-B is in operation (PMSRA bit = “1”
or PMSRB bit = “1”). If PLLBT is powered-down, the AK4671 may draw excess current and it is not possible to operate
properly because utilizes dynamic refreshed logic internally. If PLLBT is powered-down, SRC-A, SRC-B and SRC-C
should be in the power-down mode (PMSRA=PMSRB bits = “0”).
MS0666-E-00
Figure 82. PCM I/F (PLLBT Reference Clock: SYNCA or BICKA pin)
Figure 83. PCM I/F (PLLBT Reference Clock: SYNCB or BICKB pin)
AK4671
AK4671
SYNCA
BICKA
SDTOA
SDTIA
SYNCB
BICKB
SDTOB
SDTIB
SYNCA
BICKA
SDTOA
SDTIA
SYNCB
BICKB
SDTOB
SDTIB
16fs2 or 32fs2
16fs2 or 32fs2
≥ 16fs2
≥ 16fs2
- 101 -
1fs2
1fs2
1fs2
1fs2
Bluetooth Module
Bluetooth Module
SYNC
BICK
SDTI
SDTO
SYNC
BICK
SDTI
SDTO
SYNC
BICK
SDTI
SDTO
SYNC
BICK
SDTI
SDTO
Phone Module
Phone Module
[AK4671]
2007/10