ep1s25 Altera Corporation, ep1s25 Datasheet - Page 192

• Manufacturer Part Number: ep1s25
• Description: Stratix Device Family Data Sheet
• Manufacturer: Altera Corporation

Timing Model
4–22
Stratix Device Handbook, Volume 1
Internal Timing Parameters
Internal timing parameters are specified on a speed grade basis
independent of device density.
Stratix device internal timing microparameters for LEs, IOEs, TriMatrix
memory structures, DSP blocks, and MultiTrack interconnects.
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
SU
H
CO
LUT
CLR
PRE
CLKHL
SU_R
SU_C
H
CO_R
C O _ C
PIN2COMBOUT_R
PIN2COMBOUT_C
COMBIN2PIN_R
COMBIN2PIN_C
CLR
PRE
CLKHL
Table 4–37. LE Internal Timing Microparameter Descriptions
Table 4–38. IOE Internal Timing Microparameter Descriptions
Symbol
Symbol
LE register setup time before clock
LE register hold time after clock
LE register clock-to-output delay
LE combinatorial LUT delay for data-in to data-out
Minimum clear pulse width
Minimum preset pulse width
Register minimum clock high or low time. The maximum core
clock frequency can be calculated by 1/(2 × t
Row IOE input register setup time
Column IOE input register setup time
IOE input and output register hold time after clock
Row IOE input and output register clock-to-output delay
Column IOE input and output register clock-to-output delay
Row input pin to IOE combinatorial output
Column input pin to IOE combinatorial output
Row IOE data input to combinatorial output pin
Column IOE data input to combinatorial output pin
Minimum clear pulse width
Minimum preset pulse width
Register minimum clock high or low time. The maximum I/O
clock frequency can be calculated by 1/(2 × t
Performance may also be affected by I/O timing, use of PLL,
and I/O programmable settings.
Tables 4–37
Parameter
Parameter
through
4–42
Altera Corporation
describe the
CLKHL
CLKHL
January 2006
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