12
A
B
C
D
1
2
4
1
2
4
PRO-940HD
2.2 HNM BLOCK DIAGRAM
• HNM Ass'y Block Diagram
Connector to outside of the ass'y
Host controll signal
Other digital signal
Power supply block
Ethernet block
DDR block
USB block
8620 block
PCI clock
block
IC xxxx
IC7701
EDD2516AKTA-6B
[DDR-SDRAM (256Mbit)]
IC7703
AGC1027-A-PI
(S29GL128N90TFIR2)
[Flash Memory (128Mbit)]
IC7702
EDD2516AKTA-6B
[DDR-SDRAM (256Mbit)]
Connector to Main Ass'y
+5V for USB Bus-power
Memory bus
Peripheral bus
PCI bus
PCI clock
X7851
ASS1211-
[33MHz OSC]
IC7855
CY2305SC-1H
[Clock Buffer]
L7801
ATH7015-
[C. mode filter]
IC7803
R5520H001B
[USB High-side
Switch]
to USB Receptacle Connector
USB Differencial
signal
+5V
IC7753
BR93L46RFJ-W
[EEPROM (1kbit)]
IC7751
TC74LCX125
[3-state Buffer]
Tx
Rx
Tx / Rx
IC7857
TC74LCX125
[3-state Buffer]
Reset
Reset
Reset
Reset
IC7851
IC7852
TC74LCX04
[Inverter]
+3.3V
+2.5V
-5.0V
+1.2V
IC7902
NJM2846DL3-25
[Regulator IC]
IC7903
LTC3412EFE
[SW Reg. IC]
IC7904
LTC3412EFE
[SW Reg. IC]
RJ-45 Ethernet Connector
IC7801
VT6212L-G
[USB Controller]
IC7754
RTL8100CL-LF
[Ethernet Controller]
IC7601
EM8620L-LFC
[Digital Media Processor]
27MHz
X'tal
24MHz
X'tal
25MHz
X'tal
* Or, a wire is soldered
directly to IC7803.
IC7901
LM2664M6X
[Converter IC]
CN7851
*CN7802
CN7801
JA7752
AKP1307-
CN (JA) xxxx
xx MHz
X'tal
Classification of each component
IC, memory, regulator and so on
X'tal or oscillator
Power supply
Differential signal
Bus signal
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