Cyclone on a shared configuration bus

Hello, 

is it possible to configure a Cyclone device connected to a shared
serial configuration bus using the nCE signal as DCLK enable? I
would like to configure it from a SecureDigital card using Passive
Serial mode and an external microcontroller responsible for generating
DCLK and SD protocol-specific communication with the card. 
The configuration should be as fast as possible, so I don't want to
implement two separate data channels (SD => MCU and MCU => FPFA),
but to connect SD.MISO to FPGA.DATA0 and SD.CLK to
FPGA.DCLK and then simply generate the clock signal using the
MCU. But using this way I can read only a sector from the card, 
then I must prepare the next sector and so on. This setup requires
communication with the card and, obviously, Cyclone should not
read configuration stream then. Can I set nCE to 1, do the necessary
sector setup,then set it back to 0 and send the next part of the stream? 

    Best regards
    Piotr Wyderski