参数资料
型号: AS3658-BCTP
厂商: ams
文件页数: 98/158页
文件大小: 0K
描述: IC PMU POWER/AUDIO 124-CTBGA
标准包装: 2,500
应用: 便携式设备
电流 - 电源: 7mA
电源电压: 3 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 124-TFBGA
供应商设备封装: 124-CTBGA(8x8)
包装: 带卷 (TR)
AS3658
Data Sheet Confidential
- Detailed Description- Audio Functions
Table 100. i2s master control2 Register
I2s master control2
Addr:132
This register controls the external clock divider and modes for i2s master
mode
Bit
Bit Name
Default Access
0
Description
Normal I2S mode
PCM mode selected. The following additional
7
pcm_mode
0b
R/W
1
settings are necessary to enable PCM mono
mode:
sclk_invert=1
i2s_mclk_en=0 and mclk_invert=1 (internal PLL
used for generation of internal LRCLK)
9.5.1 PCM mode settings
Compatible with BlueCore3-ROM:
Figure 43. Short Frame Sync (shown with 16-bit Sample)
In short Frame Sync the falling edge of PCM_SYNC indicate the start of the PCM word. PCM_Sync is always one clock cycle long.
LRCLK PCM_SYNC
SCLK
PCM_CLK
SDI
SDO
PCM_OUT
PCM_IN Undefined
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10 11
10 11
12 13
12 13
14 15
14 15
16
16 Undefined
The following setup on PCM-Master side is needed:
AS3658 is slave only
PCM_SYNC is in short frame mode
PCM_SYNC rate is 8ksamples/s
PCM_CLK= 512kHz only (64 x PCM_SYNC)
16 Bit Linear coding of PCM_OUT and PCM_IN (MSB first, LSB last)
Mono (single channel) operation only. Only the right channel of the AS3658 is used. The left channel is same as
right channel (in the input direction of AS3658) and has to be ignored by PCM master (in output direction of
AS3658)
Note: Internally the right channel is copied to the right and left channel.
The following setup of AS3658 is needed:
Sclk_invert=1
i2s_mclk_en=0 and mclk_invert=1 (internal PLL used for generation of internal LRCLK)
pcm_mode=1 and ad_fs2=0 (Necessary to allow unsymmetrical LRCLK and sample rate of 8kHz of ADC)
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