Datasheet

SN54LVT8996, SN74LVT8996
3.3-V 10-BIT ADDRESSABLE SCAN PORTS
MULTIDROP-ADDRESSABLE IEEE STD 1149.1 (JTAG) TAP TRANSCEIVERS
SCBS686A – APRIL 1997 – REVISED DECEMBER 1999
27
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PTDI
PTDO
CON
STDO
STMS
A9–A0
Don’t Care
STMS = PTMS
PTCK
STCK
PTMS
STDI
BYP
PTRST
STRST
Select Protocol
(aborted)
ON
Don’t Care
Idle
Select Select IdleSelect
Don’t Care
Don’t Care
PTDO = STDI
STMS = PTMS
STDO = PTDI
NOTE A: The sequence of PTDI bits shown in this figure is only one of many that would produce protocol result SOFT ERROR.
Figure 18. Shadow-Protocol Timing,
Protocol Result = SOFT ERROR, Prior Connect Status = ON