Table 4-11 Definitions Of Signals Of The Bc1.1 Circuit - Huawei MediaPad 10 fhd Maintenance Manual

MediaPad10 FHD Maintenance Manual
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Table 4-11 lists the signals of the BC1.1 circuit.

Table 4-11 Definitions of signals of the BC1.1 circuit

Signal Name
USB_PICOPHY_DP/N
M_USB_DP/N
I2C1_SCL/SDA
GPIO27_BC_INTN
DOCK_USB_DP/N
DOCK_USB_ID
Working Principles of the Charging Circuit
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Figure 4-19 shows the working principles of the charging circuit.
2012-10-09
The BC1.1 chip communicates with the AP through IIC and USB interfaces. The signal
level of the IIC interface is 1.8 V. The IIC interface enables the AP to read and configure
status information about the BC1.1 chip. The USB interface is used for data
communication.
Fault analysis and location
Symptom: The BC1.1 chip cannot detect a USB peripheral.
Solution: Check whether the BC1.1 chip is properly soldered and whether its coaxial
cable or FPC cable is in good contact.
Circuit signals
Working principles
Huawei Confidential
Function
USB bus on the AP side
USB bus on the modem side
IIC bus 1
Terminal signal reported by the
BC1.1 chip to the AP
Output USB bus
USB ID signal
INTERNAL
Test Reference Value or
Oscillogram
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