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804'1
Al8641 Al8741A
WAVEFORMS FOR PROGRAMMING
COMBINATION
PROGRAMiVERIFY
MODE (EPROM'S
ONLY)
23Y' /
5V
_____
.J
f-----~---'--
PROGRAM
-------~~--VER'FY
':.....t-I'>-----
PROGRAM
----
TESTO
DBO-DB,
J--
DATA
TO
BE
PROGRAMMED VALID
r-~--~
--
-<
NEXT
ADDR C
VALID
---L-A-ST-~\/r----------------+-----------~\/r---N-,E-~-,T----
ADDRESS (8-9)
VALID
ADDRESS
ADDRESS
Voo
+25
____________
t_V_DD_W_-~-~W-T---'-------..;..----..;..------
+::
________
---=fY-TIDW
tpw
two
PROG
+5-----------
r------
~
'
___
J
-
--""\~-----
VERIFY
MODE (ROM/EPROM)
RESET
~
/
\'1.-.
__
---J
\'------'/
\~--
DBO-OB7
==>---
ADDRESS
10-71
VALID
--
-<
...
__
AD_N~_~_~_SS_-JX
...
_~_~_~T_:_AA_L~_~.J>-
- - - - - - -
_____
.J)(
...
_____
A_D_D_R_ES_S_'B_-9_I_V_A_Ll_D
____
-J)("--
_____
N_EX_T_A_D_D_R_ES_S_V_A_L_'D
________
_
'NOTES:
1. PROG MUST FLOAT
IF
EA IS LOW (I •••• ,,2311), OR
IF
TO.5V
FOR
THE
8741A. FOR THE
8041A
PROG
MUST ALWAYS FLOAT.
2.
XTAL 1 AND XTAL 2 DRIVEN BY
3.8
MHz CLOCK
WILL
GIVE 4.17
,He
ICY'
THIS IS ACCEPT·
ABLE
FOR 8741A·8 PARTS
AS
WELL
AS
STANDARD PARTS.
3.
AO
MUST BE HELD LOW (I
•••••
OV)
DURING PROGRAMIVERIFY MODES.
The
.s741
A
EPROM
can
be
programmed by either
of
two
Intel products:
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;
9-132
00188A