Sundance SMT335E - Manual (Page 21)

Version 1.5 Page 21 of 53 SMT335E SMT375E User Manual
SDB
The SMT335E provides four Sundance Digital Buses (SDBs). These 16-bit data
parallel links for synchronous transmission can achieve high-speed data transfer
across 40-way flat ribbon cables with ground-interlaced 3.3v signals (Ref. SMT3xx-
SDB-CAB).
The SDBs are connected directly to the Virtex device and can support data rates of
up to 200MB/s (100MHz). A total data rate of 800MB/s can be sustained by running
both 16-bit buses at the same time.
An SDB integrates two 256×32-bit unidirectional FIFOs, one for input and one for
output.
FIFO
256x32x2
Control Logic
& Status
D[0..15]
CLK
WEN
REQ
ACK
FIFO
256x32x2
Control Logic
& Status
D[0..15]
CLK
WEN
REQ
ACK
SD
B
A
SD
B B
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