LG LG-T370, Руководство по обслуживанию

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3. TECHNICAL BRIEF
3.13 Touch Interface
Figure 3-13Touch Driver Block Diagram
The touch controller is an analog interface circuit for a human interface touch screen device.
All of touch functions are composed of a register-based architecture and are controlled through
the internal register sets by serial interface.
MMS-100 Series are composed of a 3-bit ARM processor, a wakeup interrupt controller (WIC), a 3-Kbytes flash
memory, an 8-Kbytes SRAM, a Receiver Controller with max 0 receiver channels(RX), a Transmitter Controller with max
3 transmitter channel(TX), an embedded IC slave with four serial I/O lines, a timer, an internal oscillator, an internal
LDO, an internal C/P for HV, and a POR.
A transmitter controller and a receiver controller activate corresponding TX channels and RX channels sequentially.
A LDO generates a regulated power supply voltage from noisy voltage source. The generated voltage is used for the
power supply voltage of analog circuits. PSRR is highly improved by the internal LDO.
A charge pump generates a high voltage source for driving TX channels. The overdriven voltage increases the signal
strength, thereby improving SNR.
A POR generates a reset signal at power-up.
3.14 Touch Interface
3. TECHNICAL BRIEF
The touch controller is an analog interface circuit for a human interface touch screen device.
All of touch functions are composed of a register-based architecture and are controlled through
the internal register sets by serial interface.
Figure 3 14 Touch Driver Block Diagram Figure 3-14 Touch Driver Block Diagram
MMS-100 Series are composed of a 32-bit ARM processor, a wakeup interrupt controller (WIC),
a 32-Kbytes flash memory, an 8-Kbytes SRAM, a Receiver Controller with max 20 receiver
channels(RX), a Transmitter Controller with max 32 transmitter channel(TX), an embedded I2C
slave with four serial I/O lines, a timer, an internal oscillator, an internal LDO, an internal C/P
for HV, and a POR.
A
i ll d i ll i di TX h l d RX A transmitter controller and a receiver controller activate corresponding TX channels and RX
channels sequentially.
A LDO generates a regulated power supply voltage from noisy voltage source. The generated
voltage is used for the power supply voltage of analog circuits. PSRR is highly improved by the
internal LDO.
A charge pump generates a high voltage source for driving TX channels. The overdriven voltage
i th i l t th th b i i SNR
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increases the signal strength, thereby improving SNR.
A POR generates a reset signal at power-up.
OSC
LDO
C/P
POR
MMS-100 Core
WIC 3-bit ARM Core
AMBA bus
AMBA bus
3-bit KB Flash
8-KB SRAM
Timer
chip
interface
1C
Slave
ISP
Transmitter Controller
Receiver Controller
HV
Swutch
HV
Swutch
HV
Swutch
Analog
Front-
end
Analog
Front-
end
Analog
Front-
end
TX0
TX1
TX31
RX0
RX1 RX19 SCL SDA
RSTB
INTB MSD SMD MSC
Max 0 RX Max 3 TX