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Topic: Transform Severino 5v to 3.3v (Read 1 time) previous topic - next topic

Mr_arduino

#5
Apr 17, 2012, 04:43 am Last Edit: Apr 17, 2012, 04:45 am by Mr_arduino Reason: 1
I have a picutre:Note this also interfaces with a spi ram chip I am using 2 chip select pins (one for sd card and one for ram chip) to select ram chip or sd card.

and an extremely hard to follow drawing
Code: [Select]

Sd card to arudiono
I am using the arduino uno r3 it should be the same on all revisions though
       ________________________________________
       |                                       |
       | ooooooooooooooooooooooooooooooooooooo |
       | o zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz  o |
       | o z dddddddddddddddddddddddddddddzd o |
       | o z d aaaaaaaaaaaaaaaaaaaaaaaaaa zd o |
________|_o_z_d_a_______________________ a zd o |
|     F D 3 2 1 0 9 8  7 6 5 4 3 2 1 0  |a zd o |
|     E N 1 1 1 1 ~      ~ ~   ~        |a zd o |
|     R G     ~ ~                  X X  |a zd o |
|     A         Digital (PWM~)     T R  |a zd o |
|  Arduino Uno                          |a zd o |
|                                       |a zd o |
|   F T                                 |a zd o |
|   E E 3                               |a zd o |
|   R S .                               |a zd o |
|   0 E 3                               |a zd o |
|   I R V                               |a zd o |
¯¯¯¯¯¯¯¯3¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯a zd o |
       3zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzazzd o
    aaa3aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa  d o |                              
    a  C3333333333333333333            ooooooo |
  bbabb3bbbb  C___________3____________o___d___C
33b33333z  bbb|bbbbbbbbbbb3bb          o   d   |
3 b a   z yyyy|yyyyyyyyy               o   d   |
_3_b_a___z_y___|________ y 3 b          o   d   |
|1 2 3 4 5 6 7 8        |y 3 b          o   d   |
|  HEF4050B             |y 3 b          o   d   |
|                       |y 3 b          o   d   |
|9 10 11 12 13 14 15 16 |y 3 b          o   d   |
¯o¯¯*¯¯¯¯¯¯¯¯¯¯q¯¯d¯¯¯¯¯ y 3 b          o   d   |
o  *        qqq  dddddddYd3dbddddddddddodddd   |
yoyy*yyyyyyyyyyyyyyyyyyyyy 3 b          o       |
yo  *        q             3 b          o       |
yooo*oooooooooooooooooooooo3ooooooooooooo       |
yy  *** 33333333333333333333 b                  |
ybbbb*b3bbbbbbbbbbbbbbbbbbbbb                  |
yb   * 3    q                                  |(GND is connected to sd pins 3 and 6 that part appears to be slightly diffucult to see)
yb  3*33    q                                  |
ybyC3*C_____q__________________________________|
 by|3*|qqqqqq   NOTE IMPORTAN READ ME!!!!!!:even though some of the
_by|3*|q_      Wires appear to be connected to another wire because they are touching another wire they are not connected they are overlapping
/912345678|     also some wire were they "overlap" appear to be broken they are NOT
|         |     This is due to 2d limitations to solve this I will write were it is connected by using something like this (Uppercase C)
|         |     After finishing this I  realized alot of wires ended up overlapping                             C_C
|  SD     |     you may have to look around to find were it goes                                                | |
|         |     Two wires overlapping
|         |     AAAAAABAAAAAAA
|_________|           B
                     B
Sd pin notes
9 unused
8 also unused
3 GND1
6 GND2
5 Clock
4 supply power (3.3v)
1 cip dection (goes to pin 10 on arduino)
HEF4050B pin notes:
VDD 1 supply voltage
1Y to 6Y 2, 4, 6, 10, 12, 15 output
1A to 6A 3, 5, 7, 9, 11, 14, input
VSS 8 ground supply voltage
n.c. 13, 16 not connected
Aurduino uno pin notes:
Pin 11 MOSI Master Out Slave In
Pin 12 Master In Slave Out (MISO)
Pin 13 is the Serial Clock
Pin 10 Slave Select pin

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