That's a bug in the LPC2000s. I asked Philips support, but they didn't know (or didn't care) about it. Anyway, it's not a real problem, you just can't rely on the SCAN_N value to ensure JTAG communication is correct. Regards, Dominic On Tuesday 04 April 2006 22:01, krisgorn wrote: > In datasheet of ARM7TDMI-S is writing that instruction SCAN_N load 0x8 > value into register but I always get 0x0 value on LPC2138 (and another > LPC2000 family chips). > When I run my code with ARM7TDMI core chips (AT91SAM7, OKI ML67) I get > proper value 0x8. > Any suggestions? > > Regards
Message
Re: [lpc2000] Debug JTAG - SCAN_N
2006-04-04 by Dominic Rath