2–32
Chapter 2: Device Datasheet for Cyclone V Devices
Configuration Specification
AS Configuration Timing
Figure 2–4 shows the timing waveform for the active serial (AS) x1 mode and AS x4
mode configuration timing.
Figure 2–4. AS Configuration Timing for Cyclone V Devices
t
(1)
POR
nCONFIG
nSTATUS
CONF_DONE
nCSO
DCLK
t
CO
t
DH
Read Address
AS_DATA0/ASDO
AS_DATA1 (2)
t
SU
bit 1
bit 0
bit N - 1
bit N
t
(3)
CD2UM
INIT_DONE (4)
User I/O
User Mode
Notes to Figure 2–4:
(1) The AS scheme supports standard and fast POR delay (tPOR). For tPOR delay information, refer to “POR Delay Specification” in the Configuration,
Design Security, and remote System Upgrades in Cyclone V Devices chapter.
(2) If you are using AS x4 mode, this signal represents the AS_DATA[3..0]and EPCQ sends in 4-bits of data for each DCLKcycle.
(3) The initialization clock can be from the internal oscillator or the CLKUSRpin.
(4) After the option bit to enable the INIT_DONEpin is configured into the device, INIT_DONEgoes low.
Table 2–36 lists the timing parameters for AS x1 and AS x4 configurations in
Cyclone V devices.
(1), (2)
Table 2–36. AS Timing Parameters for AS x1 and x4 Configurations in Cyclone V Devices—Preliminary
Symbol
tCO
Parameter
Minimum
Maximum
Unit
µs
DCLK falling edge to the AS_DATA0
/
ASDOoutput
—
4
tSU
Data setup time before the rising edge on DCLK
Data hold time after the rising edge on DCLK
CONF_DONEhigh to user mode
1.5
—
—
437
—
ns
tH
0
175
ns
tCD2UM
tCD2CU
tCD2UMC
µs
CONF_DONEhigh to CLKUSRenabled
4 x maximum DCLKperiod
—
t
CD2CU + (Tinit x CLKUSR
CONF_DONEhigh to user mode with CLKUSR
option on
—
—
—
period)
Number of clock cycles required for device
initialization
Tinit
17,408
Cycles
Notes to Table 2–36:
(1) The minimum and maximum numbers apply only if you choose the internal oscillator as the clock source for initializing the device.
(2) The tCF2CD, tCF2ST0, tCFG, tSTATUS, and tCF2ST1 timing parameters are identical to the timing parameters for passive serial (PS) mode listed in
Table 2–38 on page 2–34.
Cyclone V Device Handbook
February 2012 Altera Corporation
Volume 1: Device Overview and Datasheet
ALTERA [ ALTERA CORPORATION ]
