3.7V(~
BUAST
PEAK
~
Js
:~~f
B1sABLE
:~~i
~~l
-
-"~L------r-----------------------------------I=-=-=-=-=-=-=-=-=-=-=-=-=-:,~=-=-=-=-=-=-=-=-:r--:==---==--==--=:=""-<'=:=:=:=:=:=:=:=:=:=:=~~~~~:===I:"'======--=--=r====~~=~17~5-4~5~3)~_~~:lI
__
~-=-=:--=
__
\=~~-:=~============================================~======~~~;;;;;;;;;;~==================
___
[
wg~f~
E8~REN,~~~T
2L)
~
U24
3
MSG_
--------------~~~nl
r--ure--l
44
--RESET
BADDA8~
u.ID_
II
I,
10lA7
4U4\~
i~A7
4416
BADDA7
Bl
/
10
A7
4416
l ---::-16 "
"6
I 5V
.~.
"-
m~,
J-Q
~-r--,-
I
~
6
L~
A6
L~
A6
'1
ISHT
2R)
.
~
'"
',,,
I
'W~,,,
L..
" ,
.,
,,"-,--.,
"""
W2
5 V 3 7
4HC
11
~---'r-,,-
I"" ,
'W~,
"L
'.,
~
..
""
'-------,
~..
""
t'-"""'~
h
!'cAI0
'',''
t------<>
~
~"",
, " ,
~p~_
~'
m"~:
, -
'I"'
::::::
;;
,',
::
::
~
[:jt
::
""'
'-------,
Nt
::
""'
,
-:-:
::
"
----L"
~.
2
W3
O~--j
1----<>--------
I
r"~"
"
'"''
""~,
L'
~
.,
00'",-""
"
""'
c"--.
~"
"
""'
" " _
..
r
~
1
PI.5
6
~5
BADDAI
72
13
AI I
~~
1.0
DQ4~
\,,14
DQ4
17
BDATAO
,.
""
1:'"~
'"
" .
"'-
fl7""
""~"
"
..
'"
00'
R
~
_
' "
-'
"
,~,
'.
"
~
~
" G17 • G17
"l-~j..i".:W;-OQl"-----...§.t~
2N493 B
&12N4938j
Ii]
G18
MM8T3906
..
H.~ll
I
~.
G20
MMBSJ113
~f
3 pF
VI
PI2
~--
~.
________________
.
CAS2
~
~
CAS
~
RAS
5 V
1
re!,2
U 1'i
3
r------,.4'4
1
IU
ISHT
2R)
C70
+READ
SIG
12hpF
Mn
2
18"
1
.
Ull
3046
.
CA6
fiN
6263
,-----l
C72
~~
Jl
100DpF
F
1
Pl.3~+ACT
DISABLE]
CAS31':::::""
16
~
CAS
j]t
1
5
6
R
CAAS
S
'"
1"'"00"",,,,.~
'"
r,--.
..
,,"
'"
''''
"'-
,2."
• "
j4
W
Pl.0
LL_+
_
CASO
~
14
W I
~
__
..
_
~
__
_
,""
",1
~':~r=-~6§9r~~i~~i~-~-~.~"~~~~~~~~~~~~~~~~~
31
A15~
27
A14
BWRITE
70
_______________
_
~
EA
U13
AI4.g-_
------------.--:2."6
1
A13
BOA
TAP
62
-=
.
".
~
~----------
/77
B031
AI3~1_
--------------
12
0
1
A12
61
A12
~~
r--"
23
All
~g:i:~li60~~~~
______
-
____
_=__=__=__=__=_1~======::::--
..
____
"
V
12'"~"
,
..
" "
""
,""","
_.
__
--=-:-::-:-;;:
T
51
AIO
23 24
A9
37
1,§57...
7
__________________
T
__
===__
BDATA3
}_
3 4 3
Il%
-i9
1 I
(SHT
2R)
U36
499
2
3
U36
499
2
f
U36
099
CR5
A56 ,----!l
P3.l
A9?
25
AB
~~~
:~~~
:~~~~:f-lE:566-----------------11--_==__---
-1-:B=D7:AT;:A-;;2TnT
...
,
,,"
......
"
"'~
"''''
'"""
"'
'=1-
1"1
BDATAI
I
~
NTO
PSEN
29 1
~5
AA6
5
04116
'I
ft
MAD4
BDATA1L5~4L
________________
I
__
_====
-l--rB""D",A~TA=OlnT
~
""'
"
r'
'"
""',
"
"'"
"
.-----.
I 1
~
1
__
10 13 INTI
:~
&3
6
0 ---
---
V
~
A4
02
113
'y::ll
MAD2
BOA
TAO
B4
5V
5 V R22 L ___
.-
_____
.:J
" 7
A3
01
~V
30
MADI
ERROA
r.::::-...,
"T
A48
681
"'
"
n.'"
v:::::::::::.:
'""Vi'
,~,~
~
r"'---,
,~
'"
07
32
~
A OD..!.!--. A
MADD
DISK
CYC?
Y I R27
L.-
~~~T
2.1~~
! I A
i33iU
1
""-----=-1
9
0
~O
1
" SCSI
CYC
J!L
1
Rl1
I
-;
I
AD6
-;;-:;-
-~I
r
____
10
~
92
I lK I 10K
~22A
AD5
34
l-... 1
~
U15
MCRD
CYCr;;:;- I I
----
~--,--
--j
---
---
ISHT
2R)
__
~M02:!T].ORf!J'P'Q:OS§JIlITl'IO~N!..._t_----------------
,.. " . , "
~
'"''
'''"
'"
r¥.-
: ,
""
,~
4-,
AD3
36
I
U14
SYNC
EAA
~
,-_'=:-1
1
~22A
-DBD
,.,
"
~
'"
"m
""
""
~,
,
-{,
r
----"
~'""
_""
, • ,
5
V
,
"6
P1
12K
.
HD"TAO
21
~4
.-I-+-r--r-_
15
...,.
'"
,
..
"
r~
~
"
""
'"
~
- , :
.~
,
",~"
~""
~1!..§94--l--I+H+H-~D;B~2t1TnIC:~1in56Ei
I
""
"
:1'
""
"'r¥---
II
, "
==§:~"
~""~1ll!:++-++H-H~~D~B~3t1IIII=--ip.;~ID
'1
----;:;;;
49
I I A38 150
~
-----:IQ
MEM4
HDATA4Wl~5--t-+-++H-nH~D~B~5t1lr===_~Il2=;lrg2E
ISHT
2R)
ISHT
2R)
ISHT
2R)
5 V
(}
J
:'1
[
U37
o
7K
,I
U37
lK
12 V
-,
A61
l
910
40
WEDGE
DMA
1/0
~
I
I~
~44
39
MEM3
HDATA3
1 -OB4
'L=-.
"---1r--T
,£5
1
---------l:
-
~
GUAL
ERR
DMA
CLK~
I I
2K
+
.""
~
MEM5
HOATA5~1~4+H+H-t1+-~~tJ~======~-fT4Jl~4~
-,
~
"'~
'"u
lli:'l
' , )
~
Wl-?-3+H-MH-t1-f-~O~B6H-r~_===:n£
-----s7
15MHzCK
AUX6~
R45
42
MEM6
HDATA6111:':1++-++H--H-t-~D~B7pt_====
__
--m:::J
'
.-r-,.
"'
~~
'""
" ,
-t"
----..
...
,
'~"'"r,,g.0+H-MH-t1-f-~DB~P~--_=======-Q[JDli?:85
AUX41:~
_
M~~5T
-~DMAREQ
HDATAP~4
-ATN
------[1[]
~~"
"~
""'"
+'::
~~.
'""
"
""
~dJJ~3
DMAACK
ATN
~'~5:::~t~~::::~+~j;:~~B!:SV?::::::::::::=======_~-c3!D
,-----,-
J]J
3
J"; ,
""
~
'""~'~1L
: ,.!:, ''''''''
:::
~:!Z.7~A~I~0;3+~---:=~~~~~~----======mD!fQ:B5
lY.
~1-------"-----~---+t---------------TT--g:98~RD
DATA
~UuXx~~J:
rc:
___
_______
____
----;1
DMAIO
AST
~4~8--~;-f4----:-:;;M~SG~------:-:------QD=_-1=j4~25
4'l----r-:c:-t--t--r-I1~..J,
'c
_ I L+
=--
_~
~.'"
1~5~0--;-'6~''i'8K~>-
__
~:;m:-I-_
l!C~
I
'";,,
'I
::
:::;':
~
,
~
,Ii~~§==#
:::
::~
::H:P
::~~
---HE
L
DATA
LK
8
__
9___
,~-
~
:h~~
IN2 U19 C/O
54
11
-AEQ
O!J
I
VIN
,,,-,-
,-
,
~,~,
0.'9
_
__7J?~~_
.... 1
>--;ws-~
IN3
5080
RI/EQ
O
55
-l
-I/O
~
~----4~---T~-----~-_-_-
_
_=-=:.il_~l
VREF-
DD6~lL6-+++r-t----------ITI
[J-:
H
C
='
::
:~'
"
..
~,
~~"
~
~
~AA'
'"
~
I=-'-"
~
m",
",,/'
,
""
~
,
'"
~
~
'"
.~OO;
'"
B-c
rn::::
"'~--t++H----------rrD=
ADC
AD
~
, L
'i"El'
'i:l
2B
IN4
22
~~
~
I C74 C76 5 V 7
~ODE
D05~l£5--+-H:+--------=rITI~
-r---:-:--< LA05
~
'I
~
.....
______
Q6.2.
XORA6
A/DO
~3
128
* 1 T
01
'19
NC
j!.
14L
-l-++H----------rrfJ_'
~--+--t--r-I--
--"-
""
'"
,~
"---
1
.[ID
'~L~R3~~B
T d7' "6
WR
~~~""5'---t-,-'Tl11T
-
---.
t
r
" "
..
~
--@§l
!'-
~'"
""'~
,
.riJ
~
1.2
V
d7
~
CS
",'
1
~
""'~
"ro~,"
"'''E:'i
C'"
'
~--+-H++---------,:TL'
LA02 ~ 5 V
~
IDEN
A/D~
~
t--~
~
~,
-"
'"
T '
~""
e
""
"'-H~
67
IOWA
AlD5
r:------..
...
G19
I C73
l~
RD
DDOO~I<~~_+++:Irl-------
-1-
--
I
LA01~
/7'7--{_~
lORD
A/D~~
/77
EAXLCLEpOTDD2
;~,
r
""ffi
d,
, "'"
""
F'-
"
W.-.~,
: ,
,,_
~
..
~,
"".
~
1_,
~-'-
~ -~'
~~"::11~~~~~~ld~~~~~~~~~~iiiiiiiiiiiiiiiiiii~-f~~~~~J
-f~J~~~R~~
~~~
~~
L!2..j
12MHz
RST
AMP
'p'I
·"'0"_________
-
----------------
--
,~.~li~'
t~t~~~*~~~~~-
_!~~~!~~=====~~~~~j~-
-~---~r~lrJrJ--JI~:
__
-_=
-====={~5~61=A=S=T=CA=P===R======r===fT=---------~~~-W;A~_ISHT
2L
U25
1~1
~~~-----
--
---------~l~~~~~~~~~~~~~~j~~~~~~f-~~{~~~~=~{JJ~~~l~~~~~~~~~~~~~~~~~~~~~11}f~1~~~
~~~
CLI<
19
15TMMHGZCTLA
,----]---
t-
1
osc
15Mt-=-...8
__
r--
__
._.
WEDGE
c=2
_______
t-
'-1-
1-_____________
--------------t--------;:===--f----t-------i="
_
,~'"
,~;~,
I
,
OO~
rnR,~
-.
C -
~~~====~~======~==~~~~~~~~~~==~~======~~~~~~~~~
_
_____
HU
O~
~~
2U
PAEVLD
>'1...,4________
II
lL
I
____________________
_====--_-
__
-----------
-----r---:-:-+
AGC
DAC
_ISHT
2L)
TP3
~--;-
__
20
,PHCO~P
15MHzCK
f-'2~1
_______
1rl
-
'-----__
____
...0:::,
~~T
~~U
~~~3~~~~i-tlt~~~~~~~~~~~~~~~~~~~~~~~~=-=-=-=======r=~=f~==~~====
+~~
~
1 '
••
"
",.
~
""&--.
., "
-
--.:+':.ER~AW~D~AT!.!AL----'-----I-__=D=z7jOUT
EN
12MHZCKI.I~6==r~~f_------------------::===========___
_
__
.
_______
.ENCDDED
DATA
mJ
2MHZCK~3
-----
-..
_
-,
___
.
____________________
--'-"='~
__
__.- I
~
cT
__
ES_T_2_____
.-J
- -
_____________
-SPIN
1
AUXO)
ISHT;
2Ll
R58
IK
-POA A
-
-POA B
J
5
:10
10K
5V
§
LF
o
C2
I'RE' U29
=
11 J Q 9
74LSI12
.1
12
K
13
IT
7
ern
14
4
974HCli
~
Jll-
L--.--t-::-:::;:-:--;----
R89
100
- -
------
t-
5 V
~"v----T---T-·-···lc20
-,
C21
R18
AI7
J.Ol
:~I~K
Tal
1.5K
UK
~
r---
11
3 2
..
,!lel.-
PG2
IRSU
.B~c
PCT
~
~_---:15_
I
HBW
DPB455
CLK
r8~
__
_
L-
___
~17;_2FCLK
Ul
DATA~.
___
._
~15
A?O
RI9
t
C
0;'2
I 5 V
"l
R46
2K
"
R87
100
--
-
~
~.--
~'"74~~3+-----------------------
~~:
~~
~
----
~----T---~u~-·6;
131.
U20
3V~~----------_-~=----_==
____
_
+HS2 10
41.
4V
t-----
___
I
f+H'S1i2
5A
5Y
~
______ .
______
-_-_--_-
__
_
~~
61.
6V~I~3---------------
+HS3 1
AUX3)
[:=J
--------=::::::::::::::::=--::::-::::::::::::::::------------------~.~T~ES~T:A~D~CL~K~
_
_[l[]
(SHT
2U
--------------------------
-WA
GATE
+BUF
WR
DATA
m
--------------~~~
.
--
-BUF
WA
GA
TE
O!J
-~------
-
.BUF
HS2---------Cill
----
--
..
--
------------:;:.-;;;BU-;;:F=-
><H'S"1
-----C[:J
--------------
+BUF
HSO
c::ID
--
Figure
3-4
Sheet
3
~~+_WR
UNSAF~
L
CIB 100
J
330PF
ell
---
--
.---~-~~::
--
-
Fi
Ie:
B022007C
Drwng:
NAM
NG
------,--M-U-S~T-C~O~N~F~U~H:\~.
7T~O~E;N;G~I~N~EE~R~I~NGG~S;P~ECC----======][============~~J~U~~Clrrt~lJ~rn~~::~------l
~£
~R:
MAHRIALj
TOLERANCE
UNLEESDS
TITLE
SCHEMATIC,
Q200
PCB7
~
~
~
~~~~~============~~--~O~T~H~E~_R~:~~~S~E~N~O~T~~--tED~E2T~A~IL~====~~====~AELEASEDFORAS5EMBLY
Rev:
L
Page
03
of
03
Date:
0/10/87
§
~
i
~---:7::-r------------,
LIN EA R
'.X
X X
DES
IG
N
:I'
CASE
DE
PT H
APPRO
~
i
~
HARD~ESS
ANGULAR'
LE
~ ~
~
I-=0:....;U_T_S_ID_E
____
-;M::-A-;:X;;]
SCA
NoNE
g
~
~
~~~~~~~NT
'-.
INSIDE
MAX
OF 3