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Jim Granville
06/05/13 18:52
Read: 927 times


 
#189870 - No Crystal needed
Responding to: Mikkel C. Simonsen's previous message
Mikkel C. Simonsen said:
But perhaps a crystal or external oscillator is needed for programming? I was hoping someone had attempted this before.


LP214 Data says

The ISP Interface does not require any clock other than SCK and is not limited by the system clock frequency. During In-System programming the system clock source of the target device can operate normally.


and it also says

• The SS pin should not be left floating during reset if ISP is enabled.
• The ISP Enable Fuse must be set to allow programming during any reset period. If the ISP Fuse is disabled, ISP may only be entered at POR.


If there is no device, does it complain about DeviceID ?
Usually a programmer reads-back the Device ID, and that can be a good sanity check.

AT89LP213: Atmel Signature Bytes Address
00H = 1EH
01H = 27H
02H = FFH
AT89LP214: Atmel Signature Bytes Address
00H = 1EH
01H = 28H
02H = FFH



If that still does not work, I think this supports LP214

http://www.8052.com/forum/read/188800

LP214 shows on the ISP via SPI menu, and you need to pgm a simple C51 as a Serial-spi bridge (code supplied).

List of 18 messages in thread
TopicAuthorDate
Programming AT89LP214      Mikkel C. Simonsen      06/05/13 12:02      
   easily      Erik Malund      06/05/13 13:26      
      Not so easy with an Arghmel      Mikkel C. Simonsen      06/05/13 15:53      
   How certain are you of the applicability of your cable?      Richard Erlacher      06/05/13 15:26      
      Correct, ancient, cable      Mikkel C. Simonsen      06/05/13 16:08      
         No Crystal needed      Jim Granville      06/05/13 18:52      
            More testing      Mikkel C. Simonsen      06/05/13 21:13      
               SS is needed      Jim Granville      06/05/13 22:25      
                  The secret SS pin      Mikkel C. Simonsen      06/06/13 06:29      
                     Secret SS      Michael Karas      06/06/13 14:36      
                        Parallel ports are easy to find...      Mikkel C. Simonsen      06/06/13 17:19      
                           Bugs...      Mikkel C. Simonsen      06/06/13 18:17      
                               Bugs...      Jim Granville      06/06/13 20:05      
                                 Size matters      Mikkel C. Simonsen      06/06/13 20:24      
                                    with all this stupid stuff I would immediately ...      Erik Malund      06/07/13 07:59      
                                       Alternatives      Mikkel C. Simonsen      06/09/13 13:35      
                              What do you expect ... it's ATMEL      Richard Erlacher      06/06/13 20:52      
                     this is ATMEL ... what do you expect?      Richard Erlacher      06/06/13 20:51      

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