您好,
我很难让PLL锁定,
PCM1865的MCLK源是一个12MHz 50ppm振荡器,然后配置PLL我确实看到SCK/Bck/LRCK引脚上的预期频率,但没有锁定(reg 0x28 b4)
FS 4.8万的配置:
PLL:K = 8.1920 p=1 r=1,dsp1:4,dsp2:8,ADC:16,SCK:8, BCK:4,LRCK:64
完整注册表转储:
0 1 2 3 4 5 6 7 8 9 a b c d e f
00:00 00 00 00 00 86 41 41 42 42 00 4c 00 00 00 00 00 00 00 00 00
10:30 52 44 40 00 f0 00 00 00 00 00 00 00 00 00 00 00 00
20:7E 03 07 0f 50 07 03 3f 01 00 08 80 07 00
30:00 00 00 01 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00
40:80 7f 00 80 7f 00 80 7f 00 80 7f 00 80
50:7F 00 80 7f 00 80 7f 00 00 00 00 00 00 00 00 00 00
60:01 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70:70 10 0f 03 32 00 11 C4 07 00 00 00 00 00 00 00 00
80:00 00 00 00 00 86 41 41 42 42 00 4c 00 00 00 00 00 00 00 00 00
90:30 52 44 40 08 f0 00 00 00 00 00 00 00 00 00 00 00
A0:7E 03 07 0f 50 07 03 3f 01 00 08 80 07 00
B0:00 00 01 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0:80 7f 00 80 7f 00 80 7f 00 80 7f 00 80 7f 00 80
D0:7F 00 80 7f 00 80 7f 00 00 00 00 00 00 00 00 00 00
E0:01 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0:70 10 0f 03 32 00 11 C4 07 00 00 00 00 00 00 00 00
以前在本论坛中讨论过类似的问题,但在我的情况下,PLL即使使用此处提供的配置序列也无法锁定(为12MHz时钟调整的值):
i2cset -y -f 1 0x4a 0x00 0xFE i2cset -y -f 1 0x4a 0x00 0x00 0x0 i2cset -y -f 1 0x4a 0x25 0x7 i2cset -y -f 1 0x4a 0x26 0x3 i2cset -y -f 1 0x0x4a 0x27 0x3F i2cset -y -f 1 0x4a 0x4a 0x2a设置 -y -f 1 0x4a 0x21 0x03 i2cset -y -f 1 0x4a 0x22 0x07 i2cset -y -f 1 0x4a 0x23 0x0F i2cset -y -f 1 0x4a 0x29 0x00 i2cset -y -f 1 0x4a 0x2a 0x00 i2cset -y -f 1 0x4a 0x2a 0x2c -80 i设置 -f 1 0x4a 0x2D 0x07
我错过了什么吗?
此外,新版本的数据表是否有ETA?