Released
Datasheet
PM73487 QRT
PMC-Sierra, Inc.
PMC-980618
Issue 3
622 Mbps ATM Traffic Management Device
Figure 66 shows the timing for the JTAG port. The /JTAG_RESET signal is asynchronous to
JTAG_TCK.
Tch
Tcl
JTAG_TCK(i)
/JTAG_RESET(i)
JTAG_TMS(i)
JTAG_TDI(i)
Tjres
Tjsu
Tjsu
Tjh
Tjh
Tjq
Tjq
JTAG_TDO(o)
Figure 66. JTAG Timing
Signals
Symbol
Parameter
Min
Max
Unit
JTAG_TCK frequency
JTAG_TCK high
1
MHz
ns
Tch
Tcl
80
80
40
80
40
2.3
JTAG_TCK low
ns
Tjh
JTAG_TCK hold time
/JTAG_RESET low
JTAG_TCK setup time
JTAG_TMS, JTAG_TDI
/JTAG_RESET
ns
Tjres
Tjsu
Tjq
ns
JTAG_TMS, JTAG_TDI
JTAG_TDO
ns
JTAG_TCK-to-output delay
40
ns
/JTAG_RESET-to-output delay
97
PMC [ PMC-SIERRA, INC ]
