804'1Al8641 Al8741A

WAVEFORMS FOR PROGRAMMING

COMBINATION PROGRAMiVERIFY MODE (EPROM'SONLY)

23Y'

/

 

 

 

 

 

5V

_____.J

 

 

 

':.....t-I'>-----PROGRAM----

 

f-----

~---'--

PROGRAM -------

~~--VER'FY

 

 

 

 

r-~--

~

 

TESTO

 

 

 

 

 

 

 

J--

 

DATA TO BE

 

---<

NEXT ADDR

DBO-DB,

 

PROGRAMMED VALID

 

 

 

VALID C

 

---L-A-ST-~\/r----------------

+-----------

~\/r---N-,E-~-,T----

 

ADDRESS

 

ADDRESS (8-9) VALID

 

ADDRESS

 

 

 

 

 

 

Voo +25 ____________t_V_DD_W_-~-~W-T---'-------..;..----..;..------

 

+::________ ---

=fY-TIDWtpwtwo

 

PROG

+5 -----------

' ___ J r

- --""\~

~

 

 

 

VERIFY MODE (ROM/EPROM)

RESET

~

/

\'------'/

\~--

 

\'1.-.__--- J

 

 

 

DBO-OB7

==>---

10-71 VALID

---<...__AD_N~_~_~_SS_-JX..._~_~_~T_:_AA_L~_~.J>-- - -

- - - -

 

 

ADDRESS

 

 

 

 

_____.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.XTAL1 AND XTAL 2 DRIVEN BY 3.8 MHz CLOCK WILL GIVE 4.17 ,He ICY'THIS IS ACCEPT· ABLE FOR 8741A·8PARTS 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

Page 447
Image 447
Intel mcs-48 manual Program, 8041Al8641 Al8741A