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TLC5940: tlc5940 with 1024 GSCLK Pulses Configuration Available?

Part Number: TLC5940

I'm an newbie for tlc5940 .  I got TLC5940 EVM from my boss. According to the datasheet,1 GS Data Output Cycle consists of 4096 pulses.

I got a sample and sample code of TLC5940 EVM( USBv0.7_sourceCode,  MCU: TUSB3210,software:LED Frame Designer)

But it seemed to use only 1024 GSCLK to initiate EVM. And that's confused me. 

Can I set 1024 GSCLK pulses to generate GSCLK waveform? If  I use this setting anything else I need to take care?