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AM5728 Datasheet(PDF) 373 Page - Texas Instruments |
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AM5728 Datasheet(HTML) 373 Page - Texas Instruments |
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373 / 415 page  5 6 8 7 TCK RTCK JTAG_02 373 AM5729, AM5728, AM5726 www.ti.com SPRS953F – DECEMBER 2015 – REVISED MAY 2019 Submit Documentation Feedback Product Folder Links: AM5729 AM5728 AM5726 Timing Requirements and Switching Characteristics Copyright © 2015–2019, Texas Instruments Incorporated Table 7-176, Table 7-177 and Figure 7-110 assume testing over the recommended operating conditions and electrical characteristic conditions below. Table 7-176. Timing Requirements for IEEE 1149.1 JTAG With RTCK NO. PARAMETER DESCRIPTION MIN MAX UNIT 1 tc(TCK) Cycle time, TCK 62.29 ns 1a tw(TCKH) Pulse duration, TCK high (40% of tc) 24.92 ns 1b tw(TCKL) Pulse duration, TCK low (40% of tc) 24.92 ns 3 tsu(TDI-TCK) Input setup time, TDI valid to TCK high 6.23 ns tsu(TMS-TCK) Input setup time, TMS valid to TCK high 6.23 ns 4 th(TCK-TDI) Input hold time, TDI valid from TCK high 31.15 ns th(TCK-TMS) Input hold time, TMS valid from TCK high 31.15 ns Table 7-177. Switching Characteristics Over Recommended Operating Conditions for IEEE 1149.1 JTAG With RTCK NO. PARAMETER DESCRIPTION MIN MAX UNIT 5 td(TCK-RTCK) Delay time, TCK to RTCK with no selected subpaths (ICEPick is the only tap selected - when the Arm is in the scan chain, the delay time is a function of the Arm functional clock). 0 27 ns 6 tc(RTCK) Cycle time, RTCK 62.29 ns 7 tw(RTCKH) Pulse duration, RTCK high (40% of tc) 24.92 ns 8 tw(RTCKL) Pulse duration, RTCK low (40% of tc) 24.92 ns Figure 7-110. JTAG With RTCK Timing 7.27.2 Trace Port Interface Unit (TPIU) CAUTION The I/O timings provided in this section are valid only if signals within a single IOSET are used. The IOSETs are defined in Table 7-179. 7.27.2.1 TPIU PLL DDR Mode Table 7-178 and Figure 7-111 assume testing over the recommended operating conditions and electrical characteristic conditions below. Table 7-178. Switching Characteristics for TPIU NO. PARAMETER DESCRIPTION MIN MAX UNIT TPIU1 tc(clk) Cycle time, TRACECLK period 5.56 ns TPIU4 td(clk-ctlV) Skew time, TRACECLK transition to TRACECTL transition -0.96 0.96 ns |
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