Huawei MediaPad 10 fhd Maintenance Manual page 22

MediaPad10 FHD Maintenance Manual
requirements in various scenarios. The Hi6421V200 chip can connect to the AP, modem, or
Bluetooth through one I2S interface and two PCM digital audio interfaces. It can also connect
to peripherals through analog interfaces, such as line I/O and MIC interfaces.
Furthermore, the audio unit implements interworking and switching between audio signal
resources, provides sound volume adjustment, and supports digital MIC input signals.
Multiple audio amplifiers are built in the Hi6421V200 chip to drive the loudspeaker, headset,
and earpiece. The headset checking function is used to identify whether the headset is
installed. It helps the system save power overheads, and supports headset key detection.
Interface Unit
The interface unit of the Hi6421V200 chip provides the following functions:
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Figure 2-6 shows the functional blocks of the power supply.
2012-10-09
Uses SPI interfaces to implement high-rate communication with the AP
Provides a coulometer to detect changes to the electric energy of the battery
Provides a 12-bit HKADC to monitor four channels of analog parameters in real time,
including the voltage of the main battery, the temperature of the main battery, and the
voltage of the backup coin battery.
Provides the drive for one vibration motor or linear motor, one LED background drive
(maximum current 40 mA), and three LED drives (the breathing function can be
configured)
Provides one 26 MHz clock oscillator and two output drives.
Provides one 32.768 kHz clock oscillator and three output drives.
Provides one interface circuit for detecting the thermistor of the main battery.
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