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
26
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PTDI
PTDO
CON
STDO
STMS
A9–A0
Don’t Care
Don’t Care Don’t Care
A0
P
A9
P
PTDO = STDI
STMS = PTMS
A0
P
A9
P
STMS = STMS
0
PTCK
STCK
STDI
BYP
PTRST
STRST
Select Protocol Acknowledge Protocol
(aborted)
OFF
Don’t Care
Idle
Select Select Idle
PTMS Don’t Care
NOTE A: The position of PTMS shown in this figure is only one of many that would produce protocol result HARD ERROR.
Idle
Figure 17. Shadow-Protocol Timing,
Protocol Result = HARD ERROR (PTMS Change During Acknowledge Protocol),
Prior Connect Status = ON