Ampro Corporation Littleboard 550 用户手册

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Chapter 2
Product Overview
LittleBoard 550
Reference Manual
11
Major Integrated Circuits (ICs)
Table 2-1 lists the major integrated circuits, including a brief description of each, on the LittleBoard 550
and Figure 2-4 shows the location of the major chips.
Table 2-1.  Major Integrated Circuit Description and Function
Chip Type
Mfg.
Model
Description
Function
CPU (U1)
VIA
Technologies, Inc.
Eden ESP 10000,
ESP 5000, ESP 3000
CPUs offered at 1GHz,
533MHz, and 300MHz
Embedded
CPU
Northbridge
(U2)
VIA
Technologies, Inc.
VT8606 (Twister-T)
Northbridge functions plus
Video
Memory
and Video
Southbridge
(U3)
VIA
Technologies, Inc.
VT82C686B
Southbridge provides most
standard I/O functions
I/O
Functions
Super I/O
(U13)
Standard
Microsystems
SP37E760
This Super I/O controller
provides two additional serial
ports
Serial
ports
Ethernet
Controllers
(U5, U6)
Intel
82551ER
Ethernet Controllers provided
by two independent
10/100BaseT Ethernet.
Ethernet
functions
  
L
B
55
0_0
1a
L8
L3
L2
L5
CPU (U1)
J2
F5
J5
J4
J3
D
IMM1
J31
J21
U27
U26
U4
J28
Y1
Y5
U20
U2
3
U
1
9
U9
BA
T
1
Et
he
rn
et
 
    
(U
5)
No
rt
hb
ridg
      (
U2
)
S
out
hb
ridge
 
      (
U
3)
J1
J18
U3
4
U1
0
U1
5
U17
U1
1
U16
Et
he
rn
et
    
 (U
6)
U21
U25
U14
U12
U8
U7
J12
J17
J14
J13
J15
J16
J24
J11
JP4
JP3
JP7
JP8
JP5
JP6
J10
J7
J32
J23
U24
U22
U33
L9
CPU (U1)
Northbridge (U2)
Southbridge (U3)
   Ethernet 2 (U6)
Ethernet 1 (U5)
Audio
Amplifier (U27)
Audio
CODEC (U26)
Flash (U17)
Battery (Bat1)
Clock (U4)
   On Board
       Voltage
Regulation
   Circuitry
Thermal 
Monitor (U33)
Figure 2-3.  LittleBoard 550 Component Location (Top view)