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AM3892 Datasheet(PDF) 186 Page - Texas Instruments

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Part # AM3892
Description  AM389x Sitara ARM Microprocessors (MPUs)
PDF  299 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

AM3892 Datasheet(HTML) 186 Page - Texas Instruments

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3
TCK
TDO
TDI/TMS
2
4
1
1a
1b
5
6
8
7
TCK
RTCK
AM3894
AM3892
SPRS681A – OCTOBER 2010 – REVISED MARCH 2011
www.ti.com
Figure 8-41. JTAG Timing
Table 8-31. Timing Requirements for IEEE 1149.1 JTAG With RTCK
(see Figure 8-41)
NO.
MIN
MAX
UNIT
1
tc(TCK)
Cycle time, TCK
51.15
ns
1a
tw(TCKH)
Pulse duration, TCK high (40% of tc)
20.46
ns
1b
tw(TCKL)
Pulse duration, TCK low (40% of tc)
20.46
ns
3
tsu(TDI-TCK)
Input setup time, TDI valid to TCK high (20% of (tc * 0.5))
5.115
ns
3
tsu(TMS-TCK)
Input setup time, TMS valid to TCK high (20% of (tc * 0.5))
5.115
ns
th(TCK-TDI)
Input hold time, TDI valid from TCK high
10
ns
4
th(TCK-TMS)
Input hold time, TMS valid from TCK high
10
ns
Table 8-32. Switching Characteristics Over Recommended Operating Conditions for IEEE 1149.1 JTAG
With RTCK
(see Figure 8-42)
NO.
PARAMETER
MIN
MAX
UNIT
Delay time, TCK to RTCK with no selected subpaths (i.e., ICEPick
5
td(TCK-RTCK)
module is the only tap selected - when the ARM is in the scan
0
21
ns
chain, the delay time is a function of the ARM functional clock.)
6
tc(RTCK)
Cycle time, RTCK
51.15
ns
7
tw(RTCKH)
Pulse duration, RTCK high (40% of tc)
20.46
ns
8
tw(RTCKL)
Pulse duration, RTCK low (40% of tc)
20.46
ns
Figure 8-42. JTAG With RTCK Timing
186
Peripheral Information and Timings
Copyright © 2010–2011, Texas Instruments Incorporated
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Product Folder Link(s): AM3894 AM3892



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