Intel MCS48 User Manual page 161

8048/8648/8748/8035
WAVEFORMS FOR PROGRAMMING
COMBINATION PROGRAM/VERIFY
MODE
(EPROM'S
ONLY)
DB0-DB7
p,„
p,
LAST
i-20-r:
ADDRESS
VERIFY
MODE
(ROM/EPROM)
\
/ \
/ \
DB0-DB7
^/
ADDRESS
\J
DATA OUT
\_
_J
~\
(0-7)
VALID A. VALID
f
~\
NEXT
ADDRESS
XNEXT
DATA
\^
OUT
VALID
f"
X
ADDRESS
(8-9)
VALID
X
NOTES:
1.
PROG MUST FLOAT
IF
EA
IS
LOW
(i.e.,
^23V),
OR
IF
TO = 5V
FOR THE
8748.
FOR THE
8048
PROG MUST
ALWAYS
FLOAT.
2.
X1
AND
X2 DRIVEN BY
3
MHz CLOCK
WILL GIVE
5jisec trjY
THIS
IS
ACCEPTABLE FOR
8
PARTS AS WELL AS
STANDARD
PARTS.
NEXT ADDRESS
VALID
The
8748
EPROM
can be
programmed
by
either of
two
Note:
See
the
ROM/PROM
section
for
8048
ROM
ordering procedures.
Intel
DTOduCtS'
To min
i
m
'
ze
turnaround time on
the
first
25 pieces 8648
may
be
1.
PROMPT-48
Microcomputer Design
Aid, or
2.
Universal
PROM
Programmer (UPP
series) peripheral
of the
Intellec®
Development System
with a
UPP-848
Personality Card.
specified
on the
ROM
order
6-9