Hi,I am using 2131 of EZ-USB series ,We have successfully developed one product with help of MON51,but now in the second edition of our product we'd like to use both serial port on 2131 ,one used for debugging with MON51 and one to communicate with other peripharols ,the problem is that we are to use an higher baud rate of 115200 to work with other peripharols which is different from 19200(we previosly use the hex file: mon-ext-sio0-c0.hex previded by the asossiated in the docs,and the Clock is 24.000Mhz,the COM baud rate on PC is set to 19200),As sayed the manual of EZ-USB if we need both serial port,we should use T1 as baud rate generating timer,so we should modify the install.a51 file and make the MON51.hex ourselvs,we 'd try modify the file but the hex file we made still can work (can not connect to target at start),would you please show me how to modify the install.a51 and how to use install.bat rightly to gen a hex file?Thanks a lot