EP3SE50F780I3N Altera, EP3SE50F780I3N Datasheet - Page 140

• Manufacturer Part Number: EP3SE50F780I3N
• Description: Stratix III
• Manufacturer: Altera

Operational Mode Descriptions
5–40
Stratix III Device Handbook, Volume 1
chainout_round
output_saturate
chainout_saturate
accum_sload
zero_chainout
zero_loopback
rotate
shift_right
clock0
clock1
clock2
clock3
ena0
ena1
ena2
ena3
aclr0
aclr1
aclr2
aclr3
Table 5–9. DSP Block Dynamic Signals (Part 2 of 2)
Signal Name
Round control for second stage round/saturation block.
chainout_round
chainout_round
Saturation control for first stage round/saturation block for Q-
format multiply. If both rounding and saturation is enabled,
saturation is done on the rounded result.
output_saturate
output_saturate
Saturation control for second stage round/saturation block for
Q-format multiply. If both rounding and saturation’s enabled,
saturation is done on the rounded result.
chainout_saturate
chainout_saturate
Dynamically specifies whether the accumulator value is zero.
accum_sload
registers
accum_sload
Dynamically specifies whether the chainout value is zero.
Dynamically specifies whether the loopback value is zero.
rotation
shift_right
Total Signals per Half-block
DSP-block-wide clock signals
Input and Pipeline Register enable signals
DSP block-wide asynchronous clear signals (active low).
Total Count per Full Block
= 1, rotation feature is enabled
= 0, accumulation input is from the output
= 1, accumulation input is set to be zero
= 1, shift right feature is enabled
= 1 for rounding on multiply output
= 0 for normal multiply output
= 1 for saturation support
= 0 for no saturation support
= 1 for saturation support
= 0 for no saturation support
Function
Altera Corporation
October 2007
Count
11
34
1
1
1
1
1
1
1
1
4
4
4