LG LSC27990TT Service Manual page 42

EXPLANATION FOR MICOM CIRCUIT
2-4. DISPLAY circuit diagram
(1) GR-G277STSA(LSC27990TT)
JTAG
4" TFT LCD
128M NAND
FLASH
Serial Comm.
- Uart0(PIC MICOM)
- Uart1(Main PCB)
- Uart2(Home Net)
USB HOST
(Memory Stick)
ARM920T
Instruction Instruction
MMU CACHE
(16KB)
ARMSTDMI
Processor core
(Internal EMbedded ICE)
Data
CACHE
Data
MMU (16KB)
LCD LCD
CONT DMA
USB HOST CONT.
ExtMaster
NAND CONT.
NAND Flash Boot
Loader
Clock Generator Clock Generator
(MPLL/UPLL)
UART 0. 1. 2
USB Device
SDI/MMC
Watchdog
Timer
BUS CONT.
Arbitor/Decode
SPI 0. 1
100msec
timer
- 42 -
External
Coproc
Interface
AMBA
Bus
Lnf
WriteBack
PA Tag
RAM
BUS CONT
Arbitor/Decode
A
H
Interrupt CONT
B
Power
B
Mabagement
U
S
Memory CONT.
SRAM/NOR/SDRAM
(MPLL/UPLL)
12C
12S
A
H
GPIO
B
RTC
B
U
ADC
S
Timer/PWM
0~3.4 (interanl)
1msec
timer Inverter(PWM)
1M BOOT ROM
NOR FLASH
64M SDRAM
8 Key
Touch Button SW & LED
Buzzer
On/Off
Watch
Backlight Buzzer
Freq.