Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
07/21/05 05:13
Modified:
  07/21/05 05:22
Read: times


 		 #97706 - 3.3 V ??
Responding to: ???'s previous message
Hi all members,
89s53,89ls52,89lv52 are some 3.3 volt 8051 derivatives which can solve my problem,I search electronics shop here,I don't know but there aren't any of them here,89c1051,2051,4051 are existed,these mcu's can't meet my demands,one is for their small flash and second is for limited ports like P0
I have some 5 volt devices near main chip too,for instance LCD
It seems 89c52 is cheaper than 3.3 volt mcu's too,
all of above cases force me to selcet 89c52
I have now this question,how can i connect P0 and other pins to D36561,
Is there 5 volt to 3.3 volt level converter,(although it is implausible to find out here)
Can i correct this level of difference with diode?(is it legal)
Thanks beforehand
Mehdi

List of 46 messages in thread
TopicAuthorDate
Timing Firmware!            01/01/70 00:00      
   Err - read the datasheet!            01/01/70 00:00      
      Err - read the datasheet!            01/01/70 00:00      
         I don't understand the problem            01/01/70 00:00      
            dont scare            01/01/70 00:00      
               Jan & Russell            01/01/70 00:00      
                  get a dev board, there is much to learn            01/01/70 00:00      
         simple            01/01/70 00:00      
            Thanks!!!            01/01/70 00:00      
            Not as simple as you said Jan!            01/01/70 00:00      
               not, if you are very sneeky            01/01/70 00:00      
               ignored address            01/01/70 00:00      
                  Thanks Jan            01/01/70 00:00      
   different datasheet            01/01/70 00:00      
   Absolute Maximum Ratings!            01/01/70 00:00      
      3.3V?            01/01/70 00:00      
         3.3 V ??            01/01/70 00:00      
            3.3 V ??            01/01/70 00:00      
               Search Time!            01/01/70 00:00      
                  I agree...            01/01/70 00:00      
                     Dear mehdi            01/01/70 00:00      
                        Thanks            01/01/70 00:00      
                           expensive for large amount of production            01/01/70 00:00      
                              expensive for large amount of production            01/01/70 00:00      
                     Issues - not chips            01/01/70 00:00      
               5V to 3.3V solution            01/01/70 00:00      
                  Eh?            01/01/70 00:00      
                     Andy you are accurate!            01/01/70 00:00      
                  3.9M !!            01/01/70 00:00      
                     Answer Is Wrong!!!!            01/01/70 00:00      
                        that is unsafe and depending on the othe            01/01/70 00:00      
                           I agree...            01/01/70 00:00      
                              I'm at a loss            01/01/70 00:00      
                        Sorry my mistake ...            01/01/70 00:00      
                           rock solid 3.3 to 5            01/01/70 00:00      
         Design decisions.            01/01/70 00:00      
            top-bottom vs. bottom-top            01/01/70 00:00      
   Confidential information?            01/01/70 00:00      
      Andy!            01/01/70 00:00      
   Russell & Jan            01/01/70 00:00      
   0 ohm Resistor?            01/01/70 00:00      
      Isn't it obvious?            01/01/70 00:00      
         EVB!            01/01/70 00:00      
            Star Point            01/01/70 00:00      
               Furthermore            01/01/70 00:00      
      common GND            01/01/70 00:00      

Back to Subject List