3
TCK
TDO
TDI/TMS
2
4
1
1a
1b
AM3359, AM3358, AM3357, AM3356, AM3354, AM3352
SPRS717H – OCTOBER 2011 – REVISED MAY 2015
7.9
JTAG Electrical Data and Timing
Table 7-71. Timing Requirements for JTAG
(see
OPP100
OPP50
NO.
UNIT
MIN
MAX
MIN
MAX
1
t
c(TCK)
Cycle time, TCK
81.5
104.5
ns
1a
t
w(TCKH)
Pulse duration, TCK high (40% of t
c
)
32.6
41.8
ns
1b
t
w(TCKL)
Pulse duration, TCK low (40% of t
c
)
32.6
41.8
ns
t
su(TDI-TCKH)
Input setup time, TDI valid to TCK high
3
3
ns
3
t
su(TMS-TCKH)
Input setup time, TMS valid to TCK high
3
3
ns
t
h(TCKH-TDI)
Input hold time, TDI valid from TCK high
8.05
8.05
ns
4
t
h(TCKH-TMS)
Input hold time, TMS valid from TCK high
8.05
8.05
ns
Table 7-72. Switching Characteristics for JTAG
(see
OPP100
OPP50
NO.
PARAMETER
UNIT
MIN
MAX
MIN
MAX
2
t
d(TCKL-TDO)
Delay time, TCK low to TDO valid
3
27.6
4
36.8
ns
Figure 7-70. JTAG Timing
Copyright © 2011–2015, Texas Instruments Incorporated
Peripheral Information and Timings
193
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