XC3S500E-4PQG208I Xilinx Inc, XC3S500E-4PQG208I Datasheet - Page 36
![IC FPGA SPARTAN-3E 500K 208-PQFP](/photos/6/71/67100/pq208_sml.jpg)
XC3S500E-4PQG208I
Manufacturer Part Number
XC3S500E-4PQG208I
Description
IC FPGA SPARTAN-3E 500K 208-PQFP
Manufacturer
Xilinx Inc
Series
Spartan™-3Er
Datasheet
1.XC3S100E-4VQG100C.pdf
(233 pages)
Specifications of XC3S500E-4PQG208I
Package / Case
208-MQFP, 208-PQFP
Mounting Type
Surface Mount
Voltage - Supply
1.1 V ~ 3.465 V
Operating Temperature
-40°C ~ 100°C
Number Of I /o
158
Number Of Logic Elements/cells
*
Number Of Gates
*
No. Of Logic Blocks
1564
No. Of Gates
500000
No. Of Macrocells
10476
Family Type
Spartan-3E
No. Of Speed Grades
4
No. Of I/o's
158
Clock
RoHS Compliant
Total Ram Bits
368640
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
XC3S500E-4PQG208I
Manufacturer:
Xilinx Inc
Quantity:
10 000
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Functional Description
Table 22: Port Aspect Ratios
If the data bus width of Port A differs from that of Port B, the
block RAM automatically performs a bus-matching function
as described in
with a narrow bus and then read from a port with a wide bus,
the latter port effectively combines “narrow” words to form
“wide” words. Similarly, when data is written into a port with
a wide bus and then read from a port with a narrow bus, the
latter port divides “wide” words to form “narrow” words. Par-
36
Notes:
1.
2.
3.
4.
Path Width
Total Data
(w bits)
The width of the total data path (w) is the sum of the DI/DO bus width (w-p) and any parity bits (p).
The width selection made for the DI/DO bus determines the number of address lines (r) according to the relationship expressed as:
r = 14 – [log(w–p)/log(2)].
The number of address lines delimits the total number (n) of addressable locations or depth according to the following equation: n = 2
The product of w and n yields the total block RAM capacity.
18
36
1
2
4
9
DI/DO Data
Bus Width
(w-p bits)
Figure
16
32
1
2
4
8
31. When data is written to a port
1
Parity Bus
DIP/DOP
(p bits)
Width
0
0
0
1
2
4
(r bits)
ADDR
Width
Bus
14
13
12
11
10
9
2
www.xilinx.com
[w-p-1:0]
DI/DO
[15:0]
[31:0]
[0:0]
[1:0]
[3:0]
[7:0]
ity bits are not available if the data port width is configured
as x4, x2, or x1. For example, if a x36 data word (32 data, 4
parity) is addressed as two x18 halfwords (16 data, 2 par-
ity), the parity bits associated with each data byte are
mapped within the block RAM to the appropriate parity bits.
The same effect happens when the x36 data word is
mapped as four x9 words.
DIP/DOP
[p-1:0]
[0:0]
[1:0]
[3:0]
-
-
-
ADDR
[r-1:0]
[13:0]
[12:0]
[11:0]
[10:0]
[9:0]
[8:0]
Locations (n)
Addressable
DS312-2 (v3.8) August 26, 2009
16,384
No. of
8,192
4,096
2,048
1,024
512
Product Specification
3
Block RAM
(w*n bits)
Capacity
16,384
16,384
16,384
18,432
18,432
18,432
r
.
4
R
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