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MSP430F5529: usb和HIDI2C键盘

Part Number: MSP430F5529

 本人画的电路图,

HIDI2C:P3.0(UCB0SDA) 接  DN(D-)接1.5K电阻3.3V拉高,低速usb。烧写HIDI2C键盘程序。PC没有识别usb

2:usb连接,上图虚线灰色部分丢弃,插上usb,PC也无法识别