
Functional Description
CPB904
4 Functional
Description
4.1
Structure and Layout
Functional diagram of the CPB904 module is shown in Figure 4.1.
Figure 4.1:
CPB904 Block Diagram
Flash BIOS
Primary IDE
48 MHz
ISA
Out to
ETX CON
USB 2.0 & OTG
PCI Bus (33MHz or 66MHz)
VCC3SB (3.3 V)
VCORE (1.2 V)
CRT
COM3
(SST FWH)
Clock
Synthesizer
(MK1491-09F)
PCI (33/66 MHz)
Cr
y
s
ta
l
LPC Bus
ETX_VCC3 (3.3 V)
VCORE SB
ATA-66
+5VSB
66 MHz
AC97
Codec
Audio
In/Out to
ETX CON
Memory
Bus
IDE
Out to
ETX CON
USB x 4
Out to
ETX CON
DC/DC
VCCMEM (2.5 V)
PCI
Out to
ETX CON
1
4
.318
M
Hz
+5V
REFCLK
Ethernet
Out to
ETX CON
10/100 Mb/s
Ethernet
TFT
Out to
ETX CON
COM 1,2
LPT/FDD
KB/MS
TFT LCD
(18-bit)
Out to
ETX CON
CRT
Out to
ETX CON
South Bridge
(CS5536)
Geode
Companion
Device
(W83627HF)
AMD Geode
LX800
Processor
SUPER I/O
PCI to ISA
(IT8888)
2
56/
5
1
2
MB
D
DR D
R
A
M
SO
D
IM
M
2
0
0
D
D
R
C P B 9 0 4 U s e r M a n u a l
4-1
© 2 0 0 8 F a s t w e l v . 0 0 1 E