Jan 02, 2020
09:12 PM
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Jan 02, 2020
09:12 PM
HI
使用“usb control center”同一个固件烧录SPI【M25P40】,CYPUSB3014BZXI 烧录提醒"programming of spi flash succeeded"但无法枚举成UVC,重新上电依旧识别“CypressFX3 usb bootloader device” 上电期间示波器探测SPI-MCLK没有波形。
但是CYPUSB3014BZXC可正常启动并识别UVC,PMOD已经确认是SPI状态,2份原理图是一样。工业级与消费级上电期间读SPI的命令有差异?
thank help me ,thank you!
Solved! Go to Solution.
1 Solution
Jan 06, 2020
12:39 AM
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Jan 06, 2020
12:39 AM
3 Replies
Jan 03, 2020
02:23 AM
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Jan 03, 2020
02:23 AM
Hi,
这两者是没有差异的,建议你测量boot时PMODE引脚的电平是否达到预计值。
Regards,
Eddie
Jan 03, 2020
02:35 AM
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Jan 03, 2020
02:35 AM
thank you for EddieZ_31
PMOD有用示波器抓过,为3V3 及0V ,电平波动跟能正常枚举UVC电平看不出差异,这里会有时序要求?
Jan 06, 2020
12:39 AM
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Jan 06, 2020
12:39 AM
谢谢大家:
问题已解,PMOD电阻是正确的,有个晶体32K贴成了32M,另外还有2个电容被贴错。