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Only for training and service purposes
4. Trouble Shooting
4.11. USB trouble
USB Initial sequence of GT540 is :
USB connected to GT540
Æ
VCHG_VBUS go to 5V
Æ
VERG_MSME_1.8V is about 1.8V
Æ
USB_CLK is OK
Æ
USB work
΅͑͢
΅ͣ͑
΅ͤ͑
TP1
TP3
TP2