參數(shù)資料
型號(hào): AK4673EG
廠(chǎng)商: Asahi Kasei Microsystems Co.,Ltd
元件分類(lèi): Codec
英文描述: Stereo CODEC with MIC/HP-AMP and Touch Screen Controller
中文描述: 立體聲編解碼器麥克風(fēng)/惠普- AMP及觸摸屏控制器
文件頁(yè)數(shù): 97/107頁(yè)
文件大小: 1171K
代理商: AK4673EG
[AK4673]
MS0670-E-00
2007/09
- 97 -
2.
PLL Slave Mode (LRCK or BICK pin)
PMPLL bit
(Addr:01H, D0)
Internal Clock
(1)
Power Supply
PDN pin
PMVCM bit
(Addr:00H, D6)
(2)
(3)
LRCK pin
BICK pin
(4)
(5)
Input
4fs of
“H”
Example:
Audio I/F Format : MSB justified (ADC & DAC)
PLL Reference clock: BICK
BICK frequency: 64fs
Sampling Frequency: 8kHz
(3) Addr:00H, Data:40H
(2) Addr:04H, Data:32H
Addr:05H, Data:00H
(4) Addr:01H, Data:01H
Figure 86. Clock Set Up Sequence (2)
<Example>
(1)
After Power Up: The PDN pin “L”
“H”. “L” time of 150ns or more is needed to reset the AK4673.
The AK4673 should be operated by the recommended power-up/down sequence shown in “System Design
(Grounding and Power Supply Decoupling)” to avoid pop noise at line output and headphone output.
(2)
DIF1-0, FS3-0 and PLL3-0 bits should be set during this period.
(3)
Power Up VCOM: PMVCM bit = “0”
“1”
VCOM should 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.
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