Technical Information
4–9
4.3 Block Diagram Description
Figure 4–3 shows a simplified block diagram of the four logic modules in the
DECbridge 500/600 series.
Figure 4–3:
Simplified Block Diagram
LKG–5071–91I
QM module
AP (or AP2) module
FI module
(Note: DECbridge 600
has a null FI module)
NI (or NI3) module
Non-volatile
memory
48-bit
address
ROMs
Queue
manager
NI Chipset(s)
NI packet
memory
Port A
Port B
(DAS only)
NI(3) only
Translation
processor
Forwarding
processor
(NI3 only)
FDDI interface
IEEE 802.3/Ethernet
network interface(s)
FI packet
memory
Volatile
memory
Application
processor
Table
lookup
FDDI chipset
