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Hi2u I'm new in this message board, and my interest is a JTAG interfce! I have some questions to all that have more experiance with jtag: The TDO,TDI,TMS,TCK and optional TRST is a standart jtag pins, but i have MCU that have other 3 pins - nEMU0, nEMU1 and nBSCAN....(MCU is a TMS470 - ARM7TDMI+DSP cores). I found that EMU0 and EMU1 is additional jtag pins used for background debugering and emulation purpose....but last pin nBSCAN is a unknown for me !??!?!? I found little information about this in Internet.... Another device (ispLSI3000E from Lattice semiconductors) use a fifth pin, BSCAN/ispEN, to select either the Lattice ISP interface or the ispJTAG interface...... .....may be in my case nBSCAN select the core (ARM or DSP) connected to jtag port ?!?!?!?!? Can u tell me it is possibe ? Thank's at advance ! |
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Question about TMS470 JTAG ....
Started by ●November 11, 2003
Reply by ●November 12, 20032003-11-12
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Deep Genie- > I'm new in this message board, and my interest is a JTAG interfce! > I have some questions to all that have more experiance with jtag: > > The TDO,TDI,TMS,TCK and optional TRST is a standart jtag pins, but i > have MCU that have other 3 pins - nEMU0, nEMU1 and nBSCAN....(MCU is > a TMS470 - ARM7TDMI+DSP cores). I found that EMU0 and EMU1 is > additional jtag pins used for background debugering and emulation > purpose....but last pin nBSCAN is a unknown for me !??!?!? > > I found little information about this in Internet.... > > Another device (ispLSI3000E from Lattice semiconductors) use a > fifth pin, BSCAN/ispEN, to select either the Lattice ISP > interface or the ispJTAG interface...... > > .....may be in my case nBSCAN select the core (ARM or DSP) connected > to jtag port ?!?!?!?!? > Can u tell me it is possibe ? BSCAN == boundary scan. Because this pin is not present on C5xxx and C6xxx JTAG headers, my guess is that for the TMS470 JTAG header this pin has something to do with ARM core. But I doubt it selects which core. -Jeff |
