EP1C3 datasheet(80/385 Pages) ETC2

80 / 385 page

3–4

Altera Corporation

Preliminary

May 2008

Cyclone Device Handbook, Volume 1

Figure 3–1 shows the timing requirements for the JTAG signals.

Figure 3–1. Cyclone JTAG Waveforms

Table 3–4 shows the JTAG timing parameters and values for Cyclone

devices.

Table 3–4. Cyclone JTAG Timing Parameters and Values

Symbol

Parameter

Min

Max

Unit

tJCP

TCK clock period

100

—

tJCH

TCK clock high time

—

tJCL

TCK clock low time

—

tJPSU

JTAG port setup time

—

tJPH

JTAG port hold time

—

tJPCO

JTAG port clock to output

—

tJPZX

JTAG port high impedance to valid output

—

tJPXZ

JTAG port valid output to high impedance

—

tJSSU

Capture register setup time

—

tJSH

Capture register hold time

—

tJSCO

Update register clock to output

—

tJSZX

Update register high impedance to valid output

—

tJSXZ

Update register valid output to high impedance

—

TDO

TCK

tJPZX

JPCO

tJPH

t JPXZ

tJCP

tJPSU

t JCL

tJCH

TDI

TMS

Signal

to Be

Captured

Signal

to Be

Driven

JSZX

tJSSU

tJSH

JSCO

tJSXZ

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