Intel MCS48 User Manual page 456

I.
PROM AND ROM
INPUT
FORMATS
A. Acceptible
Formats
Intel
can accept
programming and masking
information
for
PROMs, EPROMs,
or
ROMs
in
the
form
of floppy
disk,
punched
paper
tape,
a
master
device
from which
to copy, or
computer punched
cards.
The
allowable formats
are given
in
Table
1.
The
preferred formats
for
the paper tape and computer
card input
media
are the
Intel Intellec
Hex
and
BPNF
since these formats
are defined to allow detection of
errors.
It is
desirable that two, preferably
different, input media
for
each customer code
be sent so
Intel
can perform
a
code
verifica-
tion to detect
any
errors
between
the
two
inputs. This procedure,
if
followed, can avoid
errors
due
to
a
mispunched
tape/card
or
sending
a
defective or
improper master
device.
All orders
must
be accompanied by
a
customer
PROM/ROM
order form.
A
copy
of the
form
is
contained
in
this section
and
additional copies are available
from
Intel Literature
Department, 3065
Bowers
Ave., Santa
Clara, California
95051.
Table
I.
Acceptable Formats
Floppy
Disk
Paper Tape Computer
Card
Master Device
•
Intel
Microcomputer
•
Intellec
Hex •
Intellec
Hex
• Same
Density and
Development System
Pin
Compatible
Single or Double •
BPNF
•
PN
to Device
which
Density Disk
is
to be
Pro-
• Hex
grammed.
A1.
Logic Levels
All data
field for
Intel's
EPROMs/PROMs/ROMs
are positive logic.
The
only exceptions
are the
4001 and 4308
ROMs
which
use negative
logic.
For
the 4001/4308, an
"0"
is
a
high output and
a
"1"
is
a
low
output. Consequently, because
the
BPNP
format
specifies the voltage
level at
the
output
of the device,
it is
necessary to input an
"0" and "1"
in
the
4001/4308
in-
struction
code
as
a
"P" and
"N"
respectively.
However,
for the
Hex
format, the 4001/4308
input should be
specified accord-
ing to the instruction code
logic state,
i.e., a
"1"
or
"0."
The below example shows
the corresponding input
for
4001
instruc-
tion codes. For comparison,
the input
for
an
8080A
is
also
given
as
an example.
1.
4001
Instruction
Code
4001
Instruction
Mnemonic
4001
Instruction
Code
Intellec
Hex
Or
Non-1
ntellec
Hex
Input
BPNF
Input
NOP
0000 0000 00 BPPPPPPPPF
WRM
1110 0000 E0
BNNNPPPPPF
2.
8080A
Instruction
Code
Instruction
Mnemonic
Instruction
Code
Intellec
Hex
Or
Non-lntellec
Hex
Input
BPNF
Input
JMP
1100 0011 C3
BPPNNNNPPF
Push
D
1101 0101
D5 BPPNPNPNPF
A2-6