EP1S80B956C7N Altera, EP1S80B956C7N Datasheet - Page 560

• Manufacturer Part Number: EP1S80B956C7N
• Description: IC STRATIX FPGA 80K LE 956-BGA
• Manufacturer: Altera
• Series: Stratix®r

Specifications of EP1S80B956C7N

• Number Of Logic Elements/cells: 79040
• Number Of Labs/clbs: 7904
• Total Ram Bits: 7427520
• Number Of I /o: 683
• Voltage - Supply: 1.425 V ~ 1.575 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 956-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -

Architecture
Figure 6–5. Adder/Output Block
6–10
Stratix Device Handbook, Volume 2
Result C
Result B
Result A
accum_sload0
accum_sload1
addnsub1
addnsub3
Result D
signa
signb
Adder/Subtractor/Accumulator Block
The adder/subtractor/accumulator is the first level of the adder/output
block. You can configure the block as an accumulator or as an
adder/subtractor.
Accumulator
When the adder/subtractor/accumulator is configured as an
accumulator, the output of the adder/output block feeds back to the
accumulator as shown in
Accumulator 0
Accumulator 1
Subtractor/
Subtractor/
Adder/
Adder/
Accumulator Feedback
Accumulator Feedback
Adder
Figure
Output Select
Multiplexer
6–5. You can use the
Registers
Output
overflow0
overflow1
Altera Corporation
July 2005