Sundance SMT358 - Manual (Page 11)

Version 2.5 Page 11 of 25 SMT358 User Manual
As shown in Figure 4 each ZBTSRAM Bank is composed of a Low Bank and a High
Bank which are selected by Address[20].
• Addr[20] = 0 selects the Low bank
• Addr[20] = 1 selects the High bank
Figure 4: Memory Addressing
Sundance Digital Bus (SDB)
The four 40-way miniature IDC connectors’ primary function is to provide bi-directional 16-
bit data paths between TIMs with data transfer rates over 200 MBytes/s.
Data rates of 200 MBytes/second through a connector have been achieved using a
ground interlaced signal cable.
Each high speed Sundance Digital Bus (SDB) Interface can transfer 16-bit data, to
and from the TIM, at such a transfer rate.
400 MBytes/Second Data rates can be reached using in parallel 2 (SDB) Interfaces
to send a 32-bit data every clock cycle at 100 MHz
The SDB Interface packs the 16-bit data transmitted into a 32-bit Word and stacks
them into a FIFO ready to be used.
The transmission can be fully bi-directional.
Many of Sundance TIM modules are being designed with this interface.
A SDB Interface is available from Sundance Multiprocessor Technology IP Centre.
ZB
T SRA
M
Hi
gh
B
A
N
K
1,
2,3,4
CONTROLLER
Addr[19:0]
VIRTEX/E
SMT35
ZB
T SRA
M
Lo
w
B
A
N
K
1,
2,3,4
Addr[20]
CE2
#CE2
Addr[19:0]
Addr[19:0]