TCK
TDO
1
7
2
3
RTCK
4
5
6
9
8
TDI/TMS/TRST
OMAP-L137
www.ti.com
SPRS563G – SEPTEMBER 2008 – REVISED JUNE 2014
Table 6-117. JTAG ID Register Selection Bit Descriptions
BIT
NAME
DESCRIPTION
31:28
VARIANT
Variant (4-Bit) value
27:12
PART NUMBER
Part Number (16-Bit) value
11-1
MANUFACTURER
Manufacturer (11-Bit) value
0
LSB
LSB. This bit is read as a "1".
6.31.2
JTAG Test-Port Electrical Data/Timing
Table 6-118. Timing Requirements for JTAG Test Port (see
Figure 6-74
)
No.
PARAMETER
MIN
MAX
UNIT
1
t
c(TCK)
Cycle time, TCK
40
ns
2
t
w(TCKH)
Pulse duration, TCK high
16
ns
3
t
w(TCKL)
Pulse duration, TCK low
16
ns
4
t
c(RTCK)
Cycle time, RTCK
40
ns
5
t
w(RTCKH)
Pulse duration, RTCK high
16
ns
6
t
w(RTCKL)
Pulse duration, RTCK low
16
ns
7
t
su(TDIV-RTCKH)
Setup time, TDI/TMS/TRST valid before RTCK high
4
ns
8
t
h(RTCKH-TDIV)
Hold time, TDI/TMS/TRST valid after RTCK high
4
ns
Table 6-119. Switching Characteristics Over Recommended Operating Conditions for JTAG Test Port
(see
Figure 6-74
)
No.
PARAMETER
MIN
MAX
UNIT
9
t
d(RTCKL-TDOV)
Delay time, RTCK low to TDO valid
15
ns
Figure 6-74. JTAG Test-Port Timing
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