User Tools

Site Tools


20b:circuit_board_details

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
20b:circuit_board_details [2008/07/23 16:01]
newell Corrected JTAG location, added other connections
20b:circuit_board_details [2008/07/23 21:16] (current)
hpmad
Line 1: Line 1:
 +===== Circuit board details =====
 +
 +Once the [[20B:​how_to_open_the_case|cover is removed]], you will be facing the back of the circuit board, like this:
 +
 +
 +  * A high resolution (1185x1693) picture of the circuit board is available [[20b:​big_circuit_board|here]]. Note: this is a 3MB file, so it may take a while to display.
 +
 +==== Important landmarks ====
 +
 +On the circuit board as pictured above, there are some key items:
 +
 +^Location^Description^
 +|J1|JTAG port|
 +|J7|Analog input pins|
 +|J8|Uncommitted I/O pins|
 +|J34|Programming port|
 +|Y1|optional crystal|
 +|U3|Optional serial to RS232 tranceiver|
 +
 +==== See Also ====
 +
 +  * [[20B:​firmware|Calculator hardware description]]
  
20b/circuit_board_details.txt · Last modified: 2008/07/23 21:16 by hpmad