Delays between bursts of data during SPI data transfer on beagle bone


I am using the Beagle Bone & running some example code from the starterware using CCS.

I have made the SPI0 functional & can see the clock & data out on pins 22 & 21 of P9 expansion header.I am sending data as 32 bit words for 20 times in a loop.

I have configured SPI in master mode with interrupts/transmit mode.

When I observe on the oscilloscope I see a burst of data (32 bits) for about 7 micro seconds & the delay between the next burst of data occurring is almost double i.e 16 microseconds.

Why this long delay between bursts of data???How can I reduce that delay???Any help is highly appreciated.

Regards Savitha