Sundance SMT358 - Manual (Page 10)

Version 2.5 Page 10 of 25 SMT358 User Manual
A simple Virtex/E interface to ZBTSRAM is provided by Xilinx and is described in Xilinx’s
Application Note: xapp136.
The on-board SRAM can be extended of another 8Mword bank present on a Mezzanine card
which connects on two of the four SMT358 SDB connectors shown in Figure 3.
Figure 3 is a detailed view of the memory signal connections to the FPGA.
Figure 3: FPGA, Memory and SDB Communication Channels
FPGA
XCVxxxxx
BG560
ZBT SRAM
BANK1
ZBT SRAM
BANK2
ZBT SRAM
BANK4
ZBT SRAM
BANK3
Data lines Data lines
Data lines Data lines
18 18
18 18
40 way IDC
SDB_ConD
40 way IDC
SDB_ConC
40 way IDC
SDB_ConB
40 way IDC
SDB_ConA
Add Lines Add Lines
Add Lines Add Lines
21 21
21 21
Control Control
Control Control
6 6
6 6
SDB A 23
Clk A
SDB B 23
Clk B
SDB C 22
Clk C
SDB D 22
Clk D