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SNJ54LVT8986HV Datasheet(PDF) 10 Page - Texas Instruments |
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SNJ54LVT8986HV Datasheet(HTML) 10 Page - Texas Instruments |
10 / 54 page www.ti.com SN54LVT8986 ,, SN74LVT8986 3.3-V LINKING ADDRESSABLE SCAN PORTS MULTIDROP-ADDRESSABLE IEEE STD 1149.1 (JTAG) TAP TRANSCEIVERS SCBS759E – OCTOBER 2002 – REVISED MAY 2007 FUNCTION TABLE 3 (Secondary TAP Configuration Using Linking Shadow Protocol) CONFI G STRST STCK POSITION STMS2 STMS1 STMS0 STDO2 STDO1 STDO0 PTDO CTDO CON2 CON1 CON0 BITS 2–0 2–0 2–0 H H H H PTCK STMS2(1) STMS1(1) STMS0(1) Z Z Z Z CTDI H H H H H L H PTCK STMS2(1) STMS1(1) PTMS Z Z PTDI STDI0 STDI0 H H L H L H H PTCK STMS2(1) PTMS STMS0(1) Z PTDI Z STDI1 STDI1 H L H H L L H PTCK STMS2(1) PTMS PTMS Z STDI0 PTDI STDI1 STDI1 H L L Single device L H H H PTCK PTMS STMS1(1) STMS0(1) PTDI Z Z STDI2 STDI2 L H H L H L H PTCK PTMS STMS1(1) PTMS STDI0 Z PTDI STDI2 STDI2 L H L L L H H PTCK PTMS PTMS STMS0(1) STDI1 PTDI Z STDI2 STDI2 L L H L L L H PTCK PTMS PTMS PTMS STDI1 STDI0 PTDI STDI2 STDI2 L L L H H H H PTCK STMS2(1) STMS1(1) STMS0(1) Z Z Z Z CTDI H H H H H L H PTCK STMS2(1) STMS1(1) PTMS Z Z PTDI Z STDI0 H H L H L H H PTCK STMS2(1) PTMS STMS0(1) Z PTDI Z Z STDI1 H L H First device in H L L H PTCK STMS2(1) PTMS PTMS Z STDI0 PTDI Z STDI1 H L L cascade L H H H PTCK PTMS STMS1(1) STMS0(1) PTDI Z Z Z STDI2 L H H chain L H L H PTCK PTMS STMS1(1) PTMS STDI0 Z PTDI Z STDI2 L H L L L H H PTCK PTMS PTMS STMS0(1) STDI1 PTDI Z Z STDI2 L L H L L L H PTCK PTMS PTMS PTMS STDI1 STDI0 PTDI Z STDI2 L L L H H H H PTCK STMS2(1) STMS1(1) STMS0(1) Z Z Z Z CTDI H H H H H L H PTCK STMS2(1) STMS1(1) PTMS Z Z CTDI Z STDI0 H H L H L H H PTCK STMS2(1) PTMS STMS0(1) Z CTDI Z Z STDI1 H L H Nor first and not last H L L H PTCK STMS2(1) PTMS PTMS Z STDI0 CTDI Z STDI1 H L L device in L H H H PTCK PTMS STMS1(1) STMS0(1) CTDI Z Z Z STDI2 L H H cascade chain L H L H PTCK PTMS STMS1(1) PTMS STDI0 Z PTDI Z STDI2 L H L L L H H PTCK PTMS PTMS STMS0(1) STDI1 CTDI Z Z STDI2 L L H L L L H PTCK PTMS PTMS PTMS STDI1 STDI0 PTDI Z STDI2 L L L H H H H PTCK STMS2(1) STMS1(1) STMS0(1) Z Z Z Z CTDI H H H H H L H PTCK STMS2(1) STMS1(1) PTMS Z Z CTDI STDI0 STDI0 H H L H L H H PTCK STMS2(1) PTMS STMS0(1) Z CTDI Z STDI1 STDI1 H L H Last device in H L L H PTCK STMS2(1) PTMS PTMS Z STDI0 CTDI STDI1 STDI1 H L L cascade L H H H PTCK PTMS STMS1(1) STMS0(1) CTDI Z Z STDI2 STDI2 L H H chain L H L H PTCK PTMS STMS1(1) PTMS STDI0 Z PTDI STDI2 STDI2 L H L L L H H PTCK PTMS PTMS STMS0(1) STDI1 CTDI Z STDI2 STDI2 L L H L L L H PTCK PTMS PTMS PTMS STDI1 STDI0 PTDI STDI2 STDI2 L L L (1) STMS level before steady-state conditions were established In order to provide the ability to cascade multiple LASPs, pad bits are used to reduce propagation delays that reduce the allowable test clock speed. These pad bits are located along the internal scan path of the LASP and, therefore, must be accommodated in the boundary-scan test program. The number of these bits ranges from one to four. The number and location completely depends on the configuration of the LASP. In Function Table 4, each LASP relative position and configuration scan path uses a (1) to indicate a pad bit in the path. 10 Submit Documentation Feedback |
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