Sundance SMT398 - Manual (Page 26)

Version 1.2.0 Page 26 of 52 SMT398 User Manual
ZBTRAM part
number Size in
bits
Size in
Bytes
Actual
Memory
size Amount
of
memory
per board
K7N401801A 4Mb 512kBytes 256kx18 2 MBytes
K7N801801M 8Mb 1MBytes 512kx18 4 MBytes
K7N161801A 16Mb 2MBytes 1Mx18 8 MBytes
K7N321801M 32Mb 4MBytes 2Mx18 16
MBytes
Table 2: ZBTRAM sizes
The total available ZBT RAM on the board is therefore 2 MBytes, 4 MBytes, 8
MBytes, or 16 MBytes
Figure 7:SMT398 ZBT Memory Banks arrangement
ZZ
CLKZBT_FB
CLKZBT
ZxDATA[15:0]
ZxADDR[20:0]
ZxWEn
ZxCKEn
ZxOEn
ZxCS2/CS2n
ZxADV
ZxLBOn
LB
On
AD
V
C
S
2/
CS
2n
OE
n
CKE
n
WE
n
ADDR DAT
A
ZBT1
FPGA
Clk Feedback
CLK
16
1
1
21
1
2
1
1
ZBT3 ZBT4
ZBT2
4 independent Memory
banks with their own
address, data and control
signals.
Connections for 1
memory bank only are
shown here.
ZZ