Texas Instruments 990 - CRU Interface Waveforms During Exercise by the CD-C Verb

SHEET
<
NCRER(*)
17 OR 18
NCRYP(*)
SHEET
1 7 OR 18
SHEET
LOGIC
SHEET
19
5
CRA9Q(*)
NCR 1 OP(*)
NCR 11 P(*)
NCR 12P(*)
NCR 1 3P(*)
NCR 1 4P(*)
NCR 1 5P(*)
WORD1 Q(-*)
PREVW 1 Q(-*)
NWCLBL(*)
NWCUBL(*)
NWILBL(*)
NWIUBL(*)
DETAIL
CRUBIT1 2
CRUBIT1 3
CRUBIT1 4
CRUBIT1 5
CRUBITOUT
STORE CLOCK-
SHEET
5
MODSELA OR B-
{
NCR 1 SP(*)
SHEET
17 OR 18
WORDtQ(*)
SHEET
NWOUBL(*)
5
SHEET
<
CRUBITINT
21
NKBINT(*)
(8)136320
INITIAL
CONDITIONS
j
REFER TO 7
DETAIL
INITIAL
CONDiTlONS
SEL WRITE CRU
READ ALL
WORD
BITS TO
BITS
1
LOGIC 1
-
/
'
I
1
I
I
l l
I
I
I
I
I
J
I
.1-
I
I
I
I
I
.
1J----
I
17
L.J
l l
I
LOGIC 1 ,
NO TRANSITIONS
WRITE CRU
WRITE BITS
WRITE BITS READ ALL
SET BIT 9
BITS TO (o-s) TO 1
9-11 AND
BITS LOGIC 0
LOGIC 0
1 3, 1 4 TO
1
J
l
1J
l
-
I
I
I
I
I
L__
F)
SET BIT 1 2
= 1
I
WRITE
0
WRITE
0
SEL
BIT Q-8
SITS 9-15 WORD
t
I
I
Figure 2-6. CRU Interface Waveforms During
Exercise by the CD-C Verb
PATTE
NOW IS
RN
T-
RE PEA
ING)
r
2-23/2-24
Digital Systems Division