Table 2-7 Dstream-St Jtag Characteristics - ARM DSTREAM-ST System And Interface Design Reference Manual

Issues with minimum setup and hold times can always be resolved by decreasing the TCK frequency,
because this increases the separation between signals changing and being sampled.
There are no separate timing requirements for the adaptive clocking mode. In adaptive mode, the
DSTREAM-ST unit samples TDO on the rising edge of RTCK and not TCK, so TDO timing is relative
to RTCK.
The following table shows the timing requirements for the JTAG signals on the DSTREAM-ST probe:
ARM 100893_0100_00_en
Note
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2 ARM

Table 2-7 DSTREAM-ST JTAG Characteristics

Parameter Min
T
clk
T
ds
Non-Confidential
DSTREAM-ST target interface connections
®
2.5 About JTAG port timing characteristics
Max Description
16.67ns 100ms TCK period
49% 51% TCK Duty Cycle
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