Chapter 1: Cyclone III Device Datasheet
1–17
Switching Characteristics
Table 1–24 lists the active configuration mode specifications for Cyclone III devices.
Table 1–24. Cyclone III Devices Active Configuration Mode Specifications
Programming Mode
Active Parallel (AP)
Active Serial (AS)
DCLK Range
20 – 40
Unit
MHz
MHz
20 – 40
Table 1–25 lists the JTAG timing parameters and values for Cyclone III devices.
(1)
Table 1–25. Cyclone III Devices JTAG Timing Parameters
Symbol
tJCP
Parameter
Min
40
20
20
1
Max
—
—
—
—
—
—
15
15
15
—
—
25
25
25
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
TCK clock period
tJCH
TCK clock high time
TCK clock low time
tJCL
tJPSU_TDI JTAG port setup time for TDI
tJPSU_TMS JTAG port setup time for TMS
3
tJPH
JTAG port hold time
10
—
—
—
5
tJPCO
tJPZX
tJPXZ
tJSSU
tJSH
JTAG port clock to output (2)
JTAG port high impedance to valid output (2)
JTAG port valid output to high impedance (2)
Capture register setup time
Capture register hold time
10
—
—
—
tJSCO
tJSZX
tJSXZ
Update register clock to output
Update register high impedance to valid output
Update register valid output to high impedance
Notes to Table 1–25:
(1) For more information about JTAG waveforms, refer to “JTAG Waveform” in “Glossary” on page 1–27.
(2) The specification is shown for 3.3-, 3.0-, and 2.5-V LVTTL/LVCMOS operation of JTAG pins. For 1.8-V LVTTL/LVCMOS
and 1.5-V LVCMOS, the JTAG port clock to output time is 16 ns.
Periphery Performance
This section describes periphery performance, including high-speed I/O, external
memory interface, and IOE programmable delay.
I/O performance supports several system interfacing, for example, the high-speed
I/O interface, external memory interface, and the PCI/PCI-X bus interface. I/O using
the SSTL-18 Class I termination standard can achieve up to the stated DDR2 SDRAM
interfacing speeds with typical DDR SDRAM memory interface setup. I/O using
general-purpose I/O standards such as 3.0-, 2.5-, 1.8-, or 1.5-LVTTL/LVCMOS are
capable of a typical 200 MHz interfacing frequency with a 10 pF load.
1
Actual achievable frequency depends on design- and system-specific factors. Perform
HSPICE/IBIS simulations based on your specific design and system setup to
determine the maximum achievable frequency in your system.
July 2012 Altera Corporation
Cyclone III Device Handbook
Volume 2
ALTERA [ ALTERA CORPORATION ]
