Toshiba Satellite A20 Series - Figure 1-3 System Unit Block Diagram; System Unit Block Diagram

1.2 System Unit Block Diagram 1 Hardware Overview
1.2 System Unit Block Diagram
Figure 1-3 is the block diagram of the system unit.
Clock Gen.
ICS
ICS951104
CPUCLK
MEMCLK AGPCLK PCICLK 48MCLK 14MCLK
P3V
P3V
Voltage
Regulator
Thermal
Sensor
Analog
Devices
ADM1032
CPU
Intel Pentium 4
DT
Northwood
2.53/2.66/2.8/3.06GHz
VID1.2V PPV
533MHz
North Bridge
ALi Sonoma-P4
w/Trident XP2 Graphics
Host-PCI Bridge
PCI-PCI Bridge
Memory Controller
Graphics Controller
BGA
645 Balls
PPV P3V BMV B2.5V B3V B5V
LCD
(TFT)
TV encoder
TVXPRESS2
B3V
CRT I/F
S-VIDEO
P3V P5V B3V
MiniPCI Slot
Wireless LAN
P3V 256 Balls
YEBISU SS
Flute
SD Cont.
(Pelican3)
CardBus
Cont.
(ToPIC100)
B3V MCVCCA
PCMCIA/ CardBus Slot
33MHz
PCI Bus
Expansion
Memory
128/256/512MB/1GB
Expansion
Memory
128/256/512MB/1GB
Slot0 Slot1
B2.5V
B1.25V
P3V
266MHz
SMBUS
BGA
352 Balls
South Bridge
ALi M1535+
PCI-South I/O bridge
IDE, USB1.1,
SM-BUS, AC' 97 Modem/Audio,
Super I/O, PIT, DMAC, PIC,
Power management
BIOS ROM
4Mbit
P5V
RTC
bq3285
R3V
P5V
P5V
HDD
Primary IDE
Secondary IDE
CDPLAY Cont.
O2Micro
OZ168
S5V
P2.5V
P3V P5V S3V S5V
Parallel Port
ODD
CD-E5V
Power Switch Panel Switch
EC/KBC
Mitsubishi
K9
S3V
3rd. I2C Bus 1st. I2C Bus
Int-KB
Touch PAD
E2PROM
Main Battery
PSC
MCV
FSNAF*
FIR
P3V
Wireless Switch. LED
B3V
MDC
RJ11
SOUND Codec
Analog
Devices
AD1981B
MIC
Line-IN
A4R7-P4V
P3V
AMP
MM1517
SND-E5V
HEADPHONE SPEAKER
FSNAS*
SD Card Slot x1
USB2.0 Cont.
NEC
UPD720101
B3V
USB Port0 USB Port1 USB Port2
BT-P3V
Bluetooth
Module
LAN-E3V
LAN Cont.
Realtek
RTL8139DL
RJ45
Figure 1-3 System unit block diagram
Satellite A20 Maintenance Manual (960-444) 1-7