TI中文支持网各位TAS2505-Q1专家你们好：
我使用TAS2505做CLUSTER音频驱动器电路图如下
使用I2C配置及内部LDO产生AVDD方式工作，相关时序如下：
/* # Playback Class-D
# Page switch to Page 0
W 30 00 00 */
{0x00, 0x00,}, /*# Assert Software reset
W 30 01 01 */
{0x01, 0x01,}, /*# Dac Instruction programming PRB #1 W 30 3c 01*/
{0x3c, 0x01,}, /*# CODEC_CLKIN=PLL_CLK.BCLK should be 1.536MHz
W 30 04 07*/
{0x04, 0x07,}, /*# PLL ON.PLL_P = 1.PLL_R=1
W 30 05 91 */
{0x05, 0x91,}, /*# PLL_J = 56
W 30 06 38 */
{0x06, 0x38,}, /*# PLL_D = 0
W 30 07 00 00*/
{0x07, 0x00,}, /*# Codec Interface control Word length = 16bits.BCLK&WCLK inputs.I2S mode.
W 30 1b 00*/
{0x1b, 0x80,},//0x80 /* # Data slot offset 00
W 30 1c 00 */
{0x1c, 0x00,}, /*# DAC NDAC Powered up, NDAC=7
W 30 0b 87 */
{0x0b, 0x87,}, /*# DAC MDAC Powered up, MDAC=2
W 30 0c 82 */
{0x0c, 0x82,}, /*# DAC OSR(9:0)-> DOSR=128
W 30 0d 00 */
{0x0d, 0x00,}, /*# DAC OSR(9:0)-> DOSR=128
W 30 0e 80*/
{0x0e, 0x80,}, /*# Only LDAC powered up.Dac path setup LDAC data Mono of LDAC and RDAC. RDAC data disabled.Soft step 1 per Fs.
W 30 3f B0 */
{0x3f, 0xB0,}, /*# DAC volume for Left channel not muted.Right DAC muted.
W 30 40 04 */
{0x40, 0x04,},
/*# LDAC digital gain 0dB
W 30 41 00*/
{0x41, 0x30,},
/*# Page Switch to Page 1
W 30 00 01*/
{0x00, 0x01,},
/*# LDO output programmed as 1.8V and Level shifters powered up.
W 30 02 00*/
{0x02, 0x00,},
/* # Master Reference Powered on
W 30 01 10 */
{0x01, 0x10,},
/* # Output common mode for DAC set to 0.9V (default)
W 30 0a 00 */
{0x0a, 0x00,},
/* # LDAC AFIR is 6th order FIR filter and Powered up.
W 30 03 00 */
{0x03, 0x00,},
/*# SPKL attn. Gain =0dB
W 30 2E 00 */
{0x2e, 0x00,},
/*# SPKL driver PGA Gain=6.0dB W 30 30 10 */
{0x30, 0x10,},
/* # SPK OSCP enabled , OCP Degltich=4, OTP enabled , OTP Deglitch=5
W 30 52 00 */
{0x52, 0x00,},
/*# SPK
蓝色IOVDD 黄色AVDD
蓝色IOVDD 黄色 RST
蓝色IOVDD黄色 SCL
蓝色IOVDD黄色WCLK
WCLK正常波形
在此时序情况下 常温 -35℃及-40℃有偶发TAS2505工作不正常情况，当TAS2505工作不正常时WCLK波形异常方波信号不能拉倒最低
请问何种情况能产生这种现象？如何避免这种异常波形。
user151383853：
特别低温下出现问题，信号驱动能力减弱， 有没有可能你外部的信号上拉能力太强了？
user5917728：
回复 user151383853:
MCU与TAS2505直接相连，中间无串阻，出现低温后将TAS2505 WCLK引脚断开测试MCU端波形正常，2505WCLK引脚输入阻抗变低。
loyforever lu：
回复 user5917728:
我也遇到了，这个问题，低温-20度就没声音了，BCLK没输出，等到常温又恢复了
