A
A
B
B
C
C
D
D
E
E
F
F
G
G
H
H
1
1
2
2
3
3
4
4
5
5
6
6
jmh
jmh
6/30/95
6/30/95
F
P.O. Box 5533 512-
365-1120
(v)
Round Rock, TX 78683
[email protected]
www.rollanet.org/~joeh/
12/14/02
R E V :
FF-8070 D.V.R.
UNUSED DEVICES
"Affordable Repeater Control Solutions"
Systems
FF
FF Systems
8070.schem
B
Rel. date
chk'd by
Des. chk
D a t e
D r a w n
by
P a g e
s i z e
T I T L E :
SHT 1 OF 4
+5V
Y1
4.00M
R1
10M
+v
rst
gnd
3
2
1
U52
34064
+5V
C44
10uF
~reset
XTAL
EXTAL
~RESET
~IRQ
~XIRQ
MODA/LIR
MODB/VSTBY
AS
VRH
VRL
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
E
R/~W
PD0
PD1
PD2
PD3
PD4
PD5
PE0
PE1
PE2
PE3
PE4
PE5
PE6
PE7
Vcc
Gnd
8
7
17
19
18
3
2
52
51
34
33
32
31
30
29
28
27
5
6
42
41
40
39
38
37
36
35
9
10
11
12
13
14
15
16
4
20
21
22
23
24
25
43
45
47
49
44
46
48
50
26
1
68HC711E9
U44
+5V
220
R25
sck
si
so
rst
Ain
Aout
mck
AP0
AP1
AP2
AP3
AP4
AP5
AP6
AP7
AP8
AP9
we
ras
cas4
cas3
cas2
cas1
data
V
c
c
A
V
c
c
G
N
D
TMS3478
8
9
10
5
2
3
6
28
1
18
19
20
21
22
23
24
25
26
27
15
17
14
13
12
11
16
4
U43
/ G
A 1
A 2
A 3
A 4
Y1
Y2
Y3
Y4
/ G
A 5
A 6
A 7
A 8
Y5
Y6
Y7
Y8
19
2
17
4
15
18
3
16
5
1
6
13
8
11
14
7
12
9
74HC244
U41
/ G
A 1
A 2
A 3
A 4
Y1
Y2
Y3
Y4
/ G
A 5
A 6
A 7
A 8
Y5
Y6
Y7
Y8
19
2
17
4
15
18
3
16
5
1
6
13
8
11
14
7
12
9
74HC244
U42
2
3
4
5
1
4002
U49 a
A8
A9
~W
~R
D
REFCAS
A0
A1
A2
A3
A4
A5
A6
A7
BNK3
BNK2
BNK1
BNK0
SELP0
SELP1
~Drst
~CAS1
~CAS2
~CAS3
~CAS4
~MPT
Dsi
Dck
~RQ0
~RQ1
~RQ2
~RQ3
R16
10K
10K
R15
BNK3b
BNK3a
R19
10K
R20
10K
3
1
2
J3
BNK3
+5V
MISO
MOSI
SPCK
~RST1
2
3
4
5
6
1
RP5 10K
2
3
4
5
6
1
10K
RP6
~MPT
~RQ0
~RQ1
~RQ2
~RQ3
~SECUR
+5V
~Sreset
1M
CONT
I / O O / I
12
10
11
d
U50
4066
CONT
I / O O / I
13
1
2
4066
a
U50
0.1
C41
530
R2
C42
1.0
DVo
Dck
Dsi
Dso
~Drst
1M
1K
R4
2N2907
Q1
+5V
20K
R5
CONT
I / O O / I
5
4
3
b
U50
4066
- 5 V
- 5 V
R6
20K
aaud
470
R3
C37
0.1
+5V
9
10
11
12
13
4002
U49 b
+5V
CONT
I / O O / I
6
8
9
4066
U50 c
- 5 V
+5d
+5V
R17
10K
+5V
busy
"A" Level
10K
VR1
DVi
C36
1.0
"B" Level
VR2
10K
C38
1.0
Dso
+5V
MEMBUS
RP5res
C39
1.0
R37
20K
R36
20K
C45
0.1
Vss
LS
CLKR
CLKIN
Vo
Agnd
Vdd
Vi
MF4
4
3
2
1
5
6
7
8
U46
R38
1M
CLR
CLK
QA
QB
QC
QD
QE
QF
QG
QH
QI
QJ
QK
QL
11
10
9
7
6
5
3
2
4
13
12
14
15
1
U53
4040
1M
RATE32
Summary of Contents for FF-8070
Page 19: ...FF 8070 Component Layout...