broken-out SPI PINs as normal digital out

Hey everyone,
To control the volume I want use the digital potentiometer “MCP41100“
http://www.instructables.com/id/Digital-Potentiometer-MCP41100-and-Arduino/all/?lang=de
Unfortunately I need PIN 11, which SPI uses for MOSI (http://arduino.cc/de/Reference/SPI) as output for my sine-waves:
http://interface.khm.de/index.php/lab/experiments/arduino-dds-sinewave-generator/

pinMode(11, OUTPUT);     // pin11= PWM  output / frequency output

So my question is, if it’s possible to use the ICSP-Header on the Arduino UNO, instead of the digital ports, and if so PIN11, PIN12 and PIN13 can be used for other tasks?

greets

No. The ICSP pins are connected to D11, D12, and D13 on an Uno. You must find another digital pin and do some pin bending to use that shield. Or you can use a Mega instead of an Uno.

Can you use another pin? 3,5,6,9,10,11 are all PWM outputs.

Hello,
Thanks for replays! ..
So when I initialize SPI, the three Pins (11,12,13 on Arduino Uno) can only be used for SPI communication.
I need to generate different frequencies of sine-waves with digitally adjustable amplitudes (volume).
As I understand the sketch I used for sine-waves generating needs Timer2:
http://interface.khm.de/index.php/lab/experiments/arduino-dds-sinewave-generator/
Timer2 is connected to Pin11 and Pin3 (ArduinoUno).
www.micha.st/?Arduino-Notizbuch:Erfahrungen:Never_touch_timer0
I changed pin11 to pin3 but I heard anything coming out my speaker. Maybe there are also other changes to do? I don’t know... my programming ability is not the best. :frowning:

It’s possible that Timer2 is used also for timing the SPI?
“SCK (Serial Clock) - The clock pulses which synchronize data transmission generated by the master”
If that’s true, I have to change dig. pot. I found one which communicate over I2C:

but the problem is the disposability here in Austria. I found for example the AD5258 in the SMD version.
http://www.conrad.at/ce/de/product/155069/Digitales-Potentiometer-Analog-Devices-AD5258BRMZ100-Gehaeuseart-MSOP-10-Ausfuehrung-64-step-Digipot-mit-EEPROM?ref=searchDetail#
I’m not sure if I can solder it and if it’s compatible with the wire library.