Altera Cyclone IV, Device Handbook

Page: 473 / 490

Chapter 1: Cyclone IV Device Datasheet 1–27
Switching Characteristics
December 2016 Altera Corporation Cyclone IV Device Handbook,
Volume 3
Table 1–29 lists the active configuration mode specifications for Cyclone IV devices.
Table 1–30 lists the JTAG timing parameters and values for Cyclone IV devices.
Periphery Performance
This section describes periphery performance, including high-speed I/O and external
memory interface.
I/O performance supports several system interfaces, such as the high-speed I/O
interface, external memory interface, and the PCI/PCI-X bus interface. I/Os using the
SSTL-18 Class I termination standard can achieve up to the stated DDR2 SDRAM
interfacing speeds. I/Os using general-purpose I/O standards such as 3.3-, 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.
Table 1–29. Active Configuration Mode Specifications for Cyclone IV Devices
Programming Mode DCLK Range Typical DCLK Unit
Active Parallel (AP)
(1)
20 to 40 33 MHz
Active Serial (AS) 20 to 40 33 MHz
Note to Table 1–29 :
(1) AP configuration mode is only supported for Cyclone IV E devices.
Table 1–30. JTAG Timing Parameters for Cyclone IV Devices
(1)
Symbol Parameter Min Max Unit
t
JCP
TCK clock period 40 — ns
t
JCH
TCK clock high time 19 — ns
t
JCL
TCK clock low time 19 — ns
t
JPSU_TDI
JTAG port setup time for TDI 1 — ns
t
JPSU_TMS
JTAG port setup time for TMS 3 — ns
t
JPH
JTAG port hold time 10 — ns
t
JPCO
JTAG port clock to output
(2) , (3)
— 15 ns
t
JPZX
JTAG port high impedance to valid output
(2) , (3)
— 15 ns
t
JPXZ
JTAG port valid output to high impedance
(2) , (3)
— 15 ns
t
JSSU
Capture register setup time 5 — ns
t
JSH
Capture register hold time 10 — ns
t
JSCO
Update register clock to output — 25 ns
t
JSZX
Update register high impedance to valid output — 25 ns
t
JSXZ
Update register valid output to high impedance — 25 ns
Notes to Table 1–30 :
(1) For more information about JTAG waveforms, refer to “JTAG Waveform” in “Glossary” on page 1–37 .
(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 output time specification is 16 ns.
(3) For EP4CGX22, EP4CGX30 (F324 and smaller package), EP4CGX110, and EP4CGX150 devices, the output time
specification for 3.3-, 3.0-, and 2.5-V LVTTL/LVCMOS operation of JTAG pins is 16 ns. For 1.8-V LVTTL/LVCMOS
and 1.5-V LVCMOS, the output time specification is 18 ns.