LG LSC27990TT Service Manual page 42

EXPLANATION FOR MICOM CIRCUIT
2-4. DISPLAY circuit diagram
(1) GR-G277STSA(LSC27990TT)
4" TFT LCD
128M NAND
FLASH
Serial Comm.
- Uart0(PIC MICOM)
- Uartl (Main PCB)
- Uart2(Home Net)
USB HOST
(Memory Stick)
JTAG
J
ARM920T
Instruction
CACHE
(16KB)
Instruction
MMU
• ARMSTDMI
Processor core
(Internal EMbedded ICE)
Data
MMU
Data
CACHE
(16KB)
External
Coproc
Interface
AMBA
Bus
Lnf
WriteBack
PA Tag
RAM
m [
<_ BUS CeNT
Arbiter/Decode
A
H
B <%::::C> [ Interrupt CeNT ]
B _ [ Power
[
Mabagement
U
s
[
<C:::::::C > Memory CONT.
__ SRAM/NOR/SDRAM
_ Clock Generator
(M PLL/U PLL)
A
H
B
<d::::::b>
<:::::::>
<C::::::C>
LCD LCD
CeNT DMA <C::::::::C>
USBHOSTCONT.
ExtMaster
NAND CONT.
NAND Flash Boot
Loader
Clock Generator
(MPLL/UPLL)
UART0.1.2 ]]]_
_[ USB Device ]
SDI/MMC ] <_
Watchdog
] <_===_
Timer
BUS CONT. ] <:_
Arbiter/Decode J
[ sP,Ol ]<_=>
B
U
S
120
12S
GPIO
1M BOOT ROM
NOR FLASH
64M SDRAM
__ 8 Key
Fouch Button6W & LED I
__ Buzzer
On/Off
RTC
ADC I
Timer/PWM
_
0~3.4 (interanl)
I I I I
100msec / 1msec Backlight Buzzer
/
timer ] timer Inverter(PWM) Freq.
--I Watch I
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