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LPC2148 USB HID Question

Hello all, on my MCB2140 i have installed USb HID example, i try to understand some basic things how it's work.

1) In the current example i set bInterval=0x0A; //10ms, everything else is unchanged. On my sniffer on host side, i read the speed of 127 B/s. So if my bInterval of sending 1 report is 10ms, should i expect the speed to be equal 100*10ms*1B= 100 B/s?

2) Is it poisable to modify this example to support a isochronous transfer or isochronous is only reserved for audio..

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