A customer on our website asked the following question:
Hi, We bought some Digilent USB JTAG cables as the website http://store.digilentinc.com/jtag-usb-cable/ and connect to our FPGA which inlcues a ARC5 CPU. We typed the command line "mdb -hard -digilent -off=check_dcache_lock_bug -nogoifmain -prop=dig_speed=100000 -connect_only" and hope the JTAG TCK is around 100KHz, but to measure the TCK by scope, the clock is always 700KHz, not 100KHz. Our goal is to adjust the TCK to 5MHz or 10MHz, could you please teach us to do the right setting?
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JColvin
A customer on our website asked the following question:
Hi,
We bought some Digilent USB JTAG cables as the website http://store.digilentinc.com/jtag-usb-cable/ and connect to our FPGA which inlcues a ARC5 CPU. We typed the command line "mdb -hard -digilent -off=check_dcache_lock_bug -nogoifmain -prop=dig_speed=100000 -connect_only" and hope the JTAG TCK is around 100KHz, but to measure the TCK by scope, the clock is always 700KHz, not 100KHz. Our goal is to adjust the TCK to 5MHz or 10MHz, could you please teach us to do the right setting?
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