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(V) of each list contains the values which should
exist on these pins
if
the test passes, The time
relative to the clock at which these points should be
observed depends on the position of the block within
the logic. The four classes defined, together with
their observation times, follow. (The clock referred
to is the clock controlling the output trigger, and
the logic page for this trigger is always given in
line AA. See Figure 39. )
1. Group A scoping values must be measured
during and after clock time for the output trigger.
2. Group B must be measured during clock time.
3. Group C must be measured before and during
clock time.
4. Group D must be measured before clock time.
The group to which a given line belongs is given
next to the value which should be found.
Column 5 of Figure 38 (Ref) contains a reference
list for all lines in the list starting from AA (the
Columns
1
2
4
5
6
G/F
v
Pin
Net
Roi
Fed By
....................
1C
.........................
AO 01 A-C4L4G08
RL071 A04
AA
AB
AF
Cl 01A-C4L4J06
RL071AT4
AB
Al
AC
CO 01 A-C2L5D13
BA31°1AC4 AC
AO
CO 01 A-C2G4D04
BA311 BH4
AO
AE
Al
AT
AU
BH
01 01A-C2F6G13
BA311AE4
AE
AG
Cl 01 A-C4L6803
Rl.0718D4
AG
00 01A-83K5B08
AM071AT4 RG
AH
AK
BA
01 01A-llJKSD06
AM071AS4 AH
AJ
01
exit point) and going through AZ, B, and BA, as far
as necessary.
Column 6 (Fed By) contains the references of all
sensitive nets feeding the block to which the line
refers. This enables the sensitive tree to be built
up. Because this is only the sensitive tree and not
the complete tree, several, points should be noted.
The fact that the output of a block is sensitive can
still allow either all or some of the inputs to be
insensitive. Figure 40 shows that
if
net BA, a 1, is
sensitive, then neither of its inputs is sensitive
because either can change without affecting the out-
put. (The FLT concept assumes only a single fail-
ure.) In the case of net CA, a 1, net BA is sensi-
tive but net AB is insensitive.
Figure 40 shows that if net EA is sensitive, then
neither net BA nor net DA is sensitive because
either could change without affecting the output.
However, going back to net AA we see that if this
changes, then both inputs to E will change and the
output will be affected. Therefore, net AA and both
of the inputs to block A are sensitive.
In
the case
FLT
Sy~
I
I
Cloe~
I
I
Groop A
f " !
•>--+1--
j
I
t
\
01A-C2K4D04
KC411AC4 Al
AL
AO
DO 01 A- 83K5B02
AM071RR4 AJ
AW BB
AS
BC
01 01A-82E3802
AN081AZ4 AK
a~.
. /
Group
8
r-J
~
/GrOYpC
I
.,J
~
\
AV
AM
AN
01
01 A-C2L4807
KC4018H4 AL
G/F
DO 01A-D2F2807
DS301DC4 AM
AR
DO 01 A-D2F2B10
OS301G84 AN
AP
AQ
BE
Dl 01 A-C2K6006
KC4018J4
AO
Dl
01A-D2G3810
OS301DA4 AP
A2
01
01A-D2G3B07
DS301C84 AQ
A3
G/F
Dl
01 A-02G3809
OS301CA4 AR
A4
Dl 01A-84LSD06
BX031AJ4
AS
AX
Dl
01 A-C2G7D06
BA311 BV4
AT
01
01A-C2D2807
BA311 BT4
AU
00 01 A-D1J3802
DR0328R4
AV
AY
AZ
01
01A-8404D11
BY031AM4 AW
00 01A-84J5B13
OR0l18J4
AX
BF
01
01 A-01 J6802
OR032C84
AY
01
01 A-D1L6D09
OR032AT4
AZ
01 01A-01H5802
OR032AS4
8
A5
Dl
OlA-0106808
DR031Cl4
BA
80
01
01 A-84E3005
BY031AN4 BB
DO 01A-84C5D12
DR021 A02 BC
BG
DO 01 A-01 M6006
DR031AL4
BO
01 01A-D2F201B
DS301GA4 BE
Dl
01A-84H6007
DR011AL4
BF
DO 01A-8406D02
RK311CD4 BG
A6
01
OIA-C2G4J02
BA311AX4 BH
Al AS
A9
BO
0
DEAD ENTRY
Rl.071AM4 Al
ENTRY
0 01 A-D2D3804
RK231A04
A2
ENTRY
0 01 A-D2D3D06
RK231AE4
A3
ENTRY
G/F
0 01 A-D2D3803
RK231 AF4
A4
ENTRY
0 OIA-OIK7D06
RK32181'4
A5
ENTRY
1 01 A-8406!!04
RK311 BD4
A6
ENTRY
0 DEAD ENTRY
BA311AV4 A7
ENTRY
0 DEAD ENTRY
BA311AU4 A8
ENTRY
0 DEAD ENTRY
BA311AT4
A9
ENTRY
0 DEAD ENTRY
BA311 AS4
BO
ENTRY
G/F
01A-82E3
CARDS
FIGURE 38. ONE-CYCLE TEST DOCUMENTATION (SCOPEX)
62
(3/71)
Model 50 FEMM
~
/
;,:;-D
•II · 1
1
4'
_.......
~~
: " " ' I
NOTE,
The clock pulse w;ll be with;n 1
~)~
I
microtecond of the FLT sync:
pulse.
)
)
\
'~--
~
'
\
FIGURE
39.
ONE-CYCLE TEST SCOPE TIMINGS
c
' - - - - - ' O R
~-----1(CA)
A
c
1---'---L---1
01
0
(CA)
0
----t(OA)
FIGURE 40. SENSITIVE NET EXAMPLES
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