EP2AGX45DF29I5N Altera, EP2AGX45DF29I5N Datasheet - Page 89

• Manufacturer Part Number: EP2AGX45DF29I5N
• Description: IC ARRIA II GX FPGA 45K 780FBGA
• Manufacturer: Altera
• Series: Arria II GXr

Specifications of EP2AGX45DF29I5N

• Number Of Logic Elements/cells: 42959
• Number Of Labs/clbs: 1805
• Total Ram Bits: 3435
• Number Of I /o: 364
• Voltage - Supply: 0.87 V ~ 0.93 V
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 100°C
• Package / Case: 780-FBGA
• Family Name: Arria® II GX
• Number Of Logic Blocks/elements: 45125
• # I/os (max): 364
• Frequency (max): 500MHz
• Operating Supply Voltage (typ): 900mV
• Logic Cells: 45125
• Ram Bits: 3565158.4
• Operating Supply Voltage (min): 0.87V
• Operating Supply Voltage (max): 0.93V
• Operating Temp Range: -40C to 100C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 780
• Package Type: FC-FBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -
• Lead Free Status / Rohs Status: Compliant

Chapter 4: DSP Blocks in Arria II GX Devices
Operational Mode Descriptions
Figure 4–17. Round and Saturation Locations
© July 2010
Altera Corporation
43
43
16 User defined SAT Positions (bit 43-28)
1
42
42
Two saturation modes are supported in Arria II GX devices:
■
■
You must select one of the two options at compile time.
In 2’s complement format, the maximum negative number that can be represented is
–2
maximum negative number to –2
■
■
Table 4–8
36-bits.
Table 4–8. Examples of Saturation
Arria II GX devices have up to 16 configurable bit positions out of the 44-bit bus
([43:0]) for the round and saturate logic unit, providing higher flexibility. You must
select the 16 configurable bit positions at compile time. These 16-bit positions are
located at bits [21:6] for rounding and [43:28] for saturation, as shown in
Figure
For symmetric saturation, the RND bit position is also used to determine where the
LSP for the saturated data is located.
(n–1)
Asymmetric saturation mode
Symmetric saturation mode
Asymmetric 32-bit saturation: Max = 0 × 7FFFFFFF, Min = 0 × 80000000
Symmetric 32-bit saturation: Max = 0 × 7FFFFFFF, Min = 0 × 80000001
44 to 36 Bits Saturation
, and the maximum positive number is 2
4–17.
5926AC01342h
ADA38D2210h
lists how the saturation works. In this example, a 44-bit input is saturated to
29
28
21
16 User defined RND Positions (bit 21-6)
20
Symmetric SAT Result
(n–1)
+ 1. For example, for 32 bits:
800000001h
7FFFFFFFFh
(n–1)
– 1. Symmetrical saturation limits the
7
6
Arria II GX Device Handbook, Volume 1
Asymmetric SAT Result
800000000h
7FFFFFFFFh
1
0
0
4–29