HW-SPAR3E-SK-US-G Xilinx Inc, HW-SPAR3E-SK-US-G Datasheet - Page 45
HW-SPAR3E-SK-US-G
Manufacturer Part Number
HW-SPAR3E-SK-US-G
Description
KIT STARTER SPARTAN-3E
Manufacturer
Xilinx Inc
Specifications of HW-SPAR3E-SK-US-G
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
122-1507
- XC3S100E-4VQG100C PDF datasheet
- HW-USB-G_PRODUCT_CHANGE PDF datasheet #2
- HW-SPAR3E-SK-US-G PDF datasheet #3
- Current page: 45 of 233
- Download datasheet (6Mb)
DS312-2 (v3.8) August 26, 2009
Product Specification
BCIN[17:0]
A[17:0]
B[17:0]
RSTB
RSTP
RSTA
CEA
CEB
CEP
CLK
Figure 37: MULT18X18SIO Primitive
R
MULT18X18SIO
B[17:0]
RSTB
RSTB
CEB
CEB
CLK
CLK
BCIN[17:0]
Figure 38: Four Configurations of the B Input
CE
D
CE
D
BREG
BREG
BCOUT[17:0]
RST
RST
BCOUT[17:0]
P[35:0]
BCOUT[17:0]
DS312-2_28_021205
Q
Q
BREG = 1
B_INPUT = CASCADE
BREG = 1
B_INPUT = DIRECT
www.xilinx.com
X
X
Cascading Multipliers
The MULT18X18SIO primitive has two additional ports
called BCIN and BCOUT to cascade or share the multi-
plier’s ‘B’ input among several multiplier bocks. The 18-bit
BCIN “cascade” input port offers an alternate input source
from the more typical ‘B’ input. The B_INPUT attribute spec-
ifies whether the specific implementation uses the BCIN or
‘B’ input path. Setting B_INPUT to DIRECT chooses the ‘B’
input. Setting B_INPUT to CASCADE selects the alternate
BCIN input. The BREG register then optionally holds the
selected input value, if required.
BCOUT is an 18-bit output port that always reflects the
value that is applied to the multiplier’s second input, which is
either the ‘B’ input, the cascaded value from the BCIN input,
or the output of the BREG if it is inserted.
Figure 38
different settings for the B_INPUT attribute and the BREG
attribute.
B[17:0]
BCOUT[17:0]
BCOUT[17:0]
BCIN[17:0]
illustrates the four possible configurations using
BREG = 0
B_INPUT = CASCADE
BREG = 0
B_INPUT = DIRECT
DS312-2_29_021505
X
X
Functional Description
45
Related parts for HW-SPAR3E-SK-US-G
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
KIT STARTER SPARTAN-3E
Manufacturer:
Xilinx Inc
Datasheet:
Part Number:
Description:
KIT STARTER SPARTAN-3E
Manufacturer:
Xilinx Inc
Datasheet:
Part Number:
Description:
KIT DEV SPARTAN3E DISPLAY
Manufacturer:
Xilinx Inc
Part Number:
Description:
KIT DEV SPARTAN3E DISPLAY
Manufacturer:
Xilinx Inc
Datasheet:
Part Number:
Description:
IC CPLD .8K 36MCELL 44-VQFP
Manufacturer:
Xilinx Inc
Datasheet:
Part Number:
Description:
IC CPLD 72MCRCELL 10NS 44VQFP
Manufacturer:
Xilinx Inc
Datasheet:
Part Number:
Description:
IC CPLD 1.6K 72MCELL 64-VQFP
Manufacturer:
Xilinx Inc
Datasheet:
Part Number:
Description:
IC CR-II CPLD 64MCELL 44-VQFP
Manufacturer:
Xilinx Inc
Datasheet:
Part Number:
Description:
IC CPLD 1.6K 72MCELL 100-TQFP
Manufacturer:
Xilinx Inc
Datasheet:
Part Number:
Description:
IC CR-II CPLD 64MCELL 56-BGA
Manufacturer:
Xilinx Inc
Datasheet:
Part Number:
Description:
IC CPLD 72MCRCELL 7.5NS 44VQFP
Manufacturer:
Xilinx Inc
Datasheet:
Part Number:
Description:
IC CR-II CPLD 64MCELL 100-VQFP
Manufacturer:
Xilinx Inc
Datasheet: