Print PDF
Favorite
Email
Step 2Making boards - and extra details.
What is left out of the manual concerning the flash chips is the power pins.
Pin 4 is ground and pin 8 is +3.3 Volts.
The chip is connected this way:
1.GND 8. (+)3.3 volts
2.GND 7. GND
3.GND 6. SCLK
4.GND 5. SDAT
It is recommended to put a 0.1uF capacitor across pins 1 and 8,
and also an LED in series with a 330 ohm resistor (optional) to tell you it's on.
It appears necessary to make the board jump the connections called
+3.3V and +3.3V LOOP (notice this also connects to pin 8)
and
+5V and +5V LOOP
Notice now there are only 3 more edge connections to make...
GND, SCLK, and SDAT...
And that all edge connections are on the back side of the board,
so be mindful that they are backwards:
Looking at the BACK side of the board the connections will be in this order.
GND NC NC /--\ /--\ SDAT SCLK NC
and /--\ represents TWO LINES connected together... remember that the
second pair is the 3 volts which goes to pin 8, and that pin 8 appears
on the upper LEFT (WHEN Looking at the BACK SIDE of the Board).
NC means that that edge trace line is not connected to anything.
If you are adding a chip to your experimenters board, make the
connections to the top row of holes above the edge connections
which are clearly labeled in reverse order on the front side of the board.
(of course...)
HAZARD:Confusion about the order of the connections is likely. Be careful.
Again notice that when connecting to the chip from the back side then the
left and right columns of pins on the chip will also be exchanged.
Beware of the fact that my small black wire is unnecessarily going from
the 5 volts loop edge-connections to the "5 volt" (red) LED, AND that wire is
hiding part of the trace for the 3 volts to pin 8 (in the second picture).
Pin 4 is ground and pin 8 is +3.3 Volts.
The chip is connected this way:
1.GND 8. (+)3.3 volts
2.GND 7. GND
3.GND 6. SCLK
4.GND 5. SDAT
It is recommended to put a 0.1uF capacitor across pins 1 and 8,
and also an LED in series with a 330 ohm resistor (optional) to tell you it's on.
It appears necessary to make the board jump the connections called
+3.3V and +3.3V LOOP (notice this also connects to pin 8)
and
+5V and +5V LOOP
Notice now there are only 3 more edge connections to make...
GND, SCLK, and SDAT...
And that all edge connections are on the back side of the board,
so be mindful that they are backwards:
Looking at the BACK side of the board the connections will be in this order.
GND NC NC /--\ /--\ SDAT SCLK NC
and /--\ represents TWO LINES connected together... remember that the
second pair is the 3 volts which goes to pin 8, and that pin 8 appears
on the upper LEFT (WHEN Looking at the BACK SIDE of the Board).
NC means that that edge trace line is not connected to anything.
If you are adding a chip to your experimenters board, make the
connections to the top row of holes above the edge connections
which are clearly labeled in reverse order on the front side of the board.
(of course...)
HAZARD:Confusion about the order of the connections is likely. Be careful.
Again notice that when connecting to the chip from the back side then the
left and right columns of pins on the chip will also be exchanged.
Beware of the fact that my small black wire is unnecessarily going from
the 5 volts loop edge-connections to the "5 volt" (red) LED, AND that wire is
hiding part of the trace for the 3 volts to pin 8 (in the second picture).
| « Previous Step | Download PDFView All Steps | Next Step » |
 |
Add Comment
|
