CV-51002
2015.12.04
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AS Configuration Timing
Symbol
Parameter
Minimum
Maximum
Unit
ns
tF
tCD2UM
tCD2CU
Input fall time
—
175
40
437
—
CONF_DONE high to user mode(84)
µs
CONF_DONE high to CLKUSR enabled
4 × maximum DCLK period
—
tCD2UMC
CONF_DONE high to user mode with CLKUSR option on
tCD2CU + (Tinit × CLKUSR
—
—
period)
Tinit
Number of clock cycles required for device initialization
17,408
—
Cycles
Related Information
FPP Configuration Timing
Provides the FPP configuration timing waveforms.
AS Configuration Timing
Table 59: AS Timing Parameters for AS ×1 and ×4 Configurations in Cyclone V Devices
The minimum and maximum numbers apply to both the internal oscillator and CLKUSR when either one is used as the clock source for device configura‐
tion.
The tCF2CD, tCF2ST0, tCFG, tSTATUS, and tCF2ST1 timing parameters are identical to the timing parameters for passive serial (PS) mode listed in PS Timing
Parameters for Cyclone V Devices table. You can obtain the tCF2ST1 value if you do not delay configuration by externally holding nSTATUS low.
Symbol
Parameter
Minimum
Maximum
Unit
ns
tCO
tSU
DCLK falling edge to the AS_DATA0/ASDO output
Data setup time before the falling edge on DCLK
Data hold time after the falling edge on DCLK
CONF_DONE high to user mode
—
2
—
1.5
ns
tDH
0
175
—
ns
tCD2UM
tCD2CU
437
—
µs
CONF_DONE high to CLKUSR enabled
4 × maximum DCLK period
—
tCD2UMC
CONF_DONE high to user mode with CLKUSR option on
tCD2CU + (Tinit × CLKUSR
—
—
period)
(84)
The minimum and maximum numbers apply only if you chose the internal oscillator as the clock source for initializing the device.
Cyclone V Device Datasheet
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