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20b:internal_connector_pinouts

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20b:internal_connector_pinouts [2008/07/23 10:44]
admin Added headers, verbiage
20b:internal_connector_pinouts [2008/07/25 23:40] (current)
newell Fixed J8 typo, adding J7 ADC input pinout
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 +===== Internal Connector Pinouts =====
 +
 +On the main circuit board, J8 is an unpopulated 5x2 connector near the CPU blob. From flipping bits, I've determined that the pinout is as below. **NOTE: This pinout has not been verified independently (we welcome verification).**
 +
 +^Pin ^Signal^
 +|J8-1 |+3VDC Supply |
 +|J8-2 |PC22 |
 +|J8-3 |PC29 |
 +|J8-4 |PC27 |
 +|J8-5 |PC28 |
 +|J8-6 |PC21 |
 +|J8-7 |PC18 |
 +|J8-8 |PC20 |
 +|J8-9 |PC19 |
 +|J8-10 | Ground |
 +
 +J7 is an unpopulated 4x2 connector. It contains the 4 ADC inputs. ​ (Full scale appears to be 1.8V.)
 +
 +^Pin ^Signal^
 +|J7-1 |ADC channel 1 |
 +|J7-2 |ADC channel 0 |
 +|J7-3 |ADC channel 2 |
 +|J7-4 |Ground |
 +|J7-5 |ADC channel 3 |
 +|J7-6 |Ground |
 +|J7-7 |+3VDC Supply |
 +|J7-8 |Ground |
 +
 +On the main circuit board, the serial programming connector is visible when the slide-off back cover is removed to replace batteries. It appears to provide the following signals. *NOTE: This pinout has not been verified independently (we welcome verification).**
 +
 +^Pad ^Signal ^
 +|J31 |+3VDC Supply |
 +|J32 |Reset |
 +|J33 |Serial out (logic level) |
 +|J34 |Ground |
 +|J35 |Serial in (logic level) |
 +|J36 |Erase? |
 +
  
20b/internal_connector_pinouts.txt · Last modified: 2008/07/25 23:40 by newell