FLEX 10K Embedded Programmable Logic Family Data Sheet
Figure 18 shows the timing requirements for the JTAG signals.
Figure 18. JTAG Waveforms
TMS
TDI
tJCP
tJCH
t JCL
tJPH
tJPSU
TCK
TDO
tJPXZ
tJPZX
tJPCO
tJSSU
tJSH
Signal
to Be
Captured
tJSCO
tJSZX
tJSXZ
Signal
to Be
Driven
Table 16 shows the timing parameters and values for FLEX 10K devices.
Table 16. JTAG Timing Parameters & Values
Symbol
Parameter
Min Max Unit
t
t
t
t
t
t
t
t
t
t
t
t
t
TCKclock period
TCKclock high time
TCKclock low time
100
50
50
20
45
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
JCP
JCH
JCL
JTAG port setup time
JPSU
JPH
JTAG port hold time
JTAG port clock to output
25
25
25
JPCO
JPZX
JPXZ
JSSU
JSH
JTAG port high impedance to valid output
JTAG port valid output to high impedance
Capture register setup time
20
45
Capture register hold time
Update register clock to output
Update register high-impedance to valid output
Update register valid output to high impedance
35
35
35
JSCO
JSZX
JSXZ
42
Altera Corporation
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