Rainbow Electronics DS31256 - Manual (Page 175)

DS31256
175 of 181
AC CHARACTERISTICS: JTAG TEST PORT INTERFACE
(V
DD
= 3.0V to 3.6V, T
A
= 0°C to +70°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
JTCLK Clock Period t1 1000 ns
JTCLK Clock Low Time t2 400 ns
JTCLK Clock High Time t3 400 ns
JTMS/JTDI Setup Time to the Rising
Edge of JTCLK
t4 50 ns
JTMS/JTDI Hold Time from the Rising
Edge of JTCLK
t5 50 ns
Delay Time from the Falling Edge of
JTCLK to Data Valid on JTDO
t6 2 50 ns
Figure 13-6. JTAG Test Port Interface AC Timing Diagram
JTCLK
JTMS/JTDI
JTDO
t4 t5
t6
t1
t2 t3