programming over SPI with multiple devices

[Simon]

I'm going to put an SPI device (ADC) in my system along side my AVR, but my AVR is programmed by SPI, presumably because my ADC needs enabling on the enable pin before it does anything there will be no conflict as the chip will just go high impedance when the AVR is put into programming mode and stops talking to it

[Mr.B]

I have done this before and not had any problems with it.
The "other device" had a pull-up resistor on the CE to ensure it was not enabled while the AVR powered up.

[mikerj]

You should provide a suitable pull-up resistor on the chip select lines of any SPI slave devices, but provided this is in place there should be no problem.

[Simon]

I'l put a 10K pullup and I've found a free pin to act as the CS line phew how long ago did i start designing this thing ?