Tektronix FG 5010 User Manual

Theory
of
Operation -
FG
5010
17
TRIG
4-58
17
TRIG
PART OF
U1720
PA4
CA2
PAS
PB7
PA6
PB7
JL .
PART OF
U1720
6
X
39
H
7 H
12
13
8
H
11
13
U1800D
DETAILED DIAGRAM .
(
X DON'T
CARE )
3D
U18000
U1800C
لمع
9
U1800C
B.
SIMPLIFIED SIGNAL PATH .
10
10
The ROM circuits provide the required fixed data storage
capacity in
read - only
configuration
for
FG
5010 operations
.
Three ROM IC's are used to provide storage addresses
from
A000
through FFFF
. A tri - state
buffer is included
to
drive the
output
data
on
the bus
. The
Device
Address
cir
cuits
provide
the
facilities for
the user to
manually assign
the
address for the
FG 5010 and
that
address to be read
out
under
microprocessor
control
over the
FG
5010
data
bus
.
As
with the
ROMs
, a tri - state
buffer
is
included
for bus
drive
.
Read - Only Memory
Three masked ROMs ( U1540 , U1440 , and U1332 ) are
used for fixed data storage . All three are supplied with buff
er
address lines
BAO
through BA12 from
the
Address buff
ers on Diagram 6. Each of the three is clocked by a separate
enable line
( chip
select ) from
Device
Address
Decoder
U1520 (
Diagram 6
) . Each
enable line
is identified
with
the
10
H
I
6
5
U1810B
R
n
C
6
Q
12
H
10
9
v
U1800B
U1800B
U1812C
P1050-5B
8
U1812C
9
8
Fig
. 4-21 .
Generation of
trigger from
IEEE - 488
bus < GET
> command
.
UP
TRIG /
GATE
OUT
( LOOP2 )
J1050
3467-27
initial ( low
order )
address of
the
associated
ROM .
Thus ,
A000
ROMCS enables ROM
U1540
, C000
ROMCS en
ables
ROM
U1440 , and
E000 ROMCS
enables
ROM
U1332 .
Note
that the
ROM enable
signals must
occur with EN
ABLE
and that
there must
be time during
which the enable
signals are
not high
so that
the
ROM ICS
can
precharge for
the
next cycle
. Thus
ENABLE is
included as an
input to the
address circuits of Device Address Decoder U1520 ( Dia
gram
6 ) .
Output
data read
from each ROM
are
supplied
through
the data bus to the Microprocessor ( Diagram 5 ) from pins 9 ,
10
, 11 , 13 , 14
, 15 , 16 , and
17 as
signals RD0
through RD7 ,
respectively
.
REV
JUL
1982
U
U
U
U
U
U
U
U
U
U
U

Tektronix FG 5010 Specifications

General

Brand	Tektronix
Model	FG 5010
Category	Portable Generator
Language	English