帮我看看这段代码

#pragma memory = dataseg(TUSB2136_SETUPPACKET_SEG)
tDEVICE_REQUEST tSetupPacket;
#pragma memory = default

#pragma memory = dataseg(TUSB2136_EP0_EDB_SEG)
tEDB0 tEndPoint0DescriptorBlock;
#pragma memory = default

#pragma memory = dataseg(TUSB2136_IEP_EDB_SEG)
tEDB tInputEndPointDescriptorBlock[3];
#pragma memory = default

请教＃pragram的用法，dataseg后面括号里的变量是不是代表地址值？？
再问.xcl文件是什么程序？