Digi NS9750 - Manual (Page 860)

J T A G t i m i n g
8 3 6 N S 9 7 5 0 H a r d w a r e R e f e r e n c e
JTAG timing
Note:
All AC characteristics are measured with 10pF, unless otherwise noted.
Table 480 describes the values shown in the JTAG timing diagram (Figure 145).
Figure 145: JTAG timing
Notes:
1 Maximum tck rate is 10 MHz.
2 rtck_out is an asynchronous output, driven off of the CPU clock.
3 trst_n is an asynchronous input.
Parm Description Min Max Unit
J1 tms (input) setup to tck rising 5 ns
J2 tms (input) hold to tck rising 2 ns
J3 tdi (input) setup to tck rising 5 ns
J4 tdi (input) hold to tck rising 2 ns
J5 tdo (output) to tck falling 2.5 10 ns
Table 480: JTAG timing parameters
J1 J2
J3 J4
J5 J5
tck
rtck_out
tms
tdi
tdo
trst_n