Do we have the JTAG pinouts anywhere? I've spent the past couple hours searching and couldn't find anything. I'm just going to sit down and randomly test tomorrow, but it would be nice not to have to.
I've spent the past couple hours searching and couldn't find anything.
JTAG pinouts are a IEEE 1149 standard. you want to use it for flash programming or CPU emulation?
1. vref? | 1.8/1.27/0
2. nTRST? | 0.0
3. TDI? | 1.63/.87/1.15/0
4. TMS? | 1.63/.87/1.15/0
5. TCK? | 1.63/.87/1.15/0
6. TRCK? | 0.04/0
7. TDO? | 0.04/0
8. NSRST? | 1.71/0
9. DBGRQ? | 0.0
10. DGBACK? | 0.0
[LIST=1]
[*]vRef Reference voltage – used to condition voltage level of Vsupply.
[*]nTRST JTAG TAP Reset
[*]TDI JTAG Test Data Input line
[*]TMS JTAG Test Data Output line
[*]TCK JTAG Test Clock, controls communication independently from the system clock.
[*]TDO JTAG Test Data Output line
[*]RTCK Returned Test Clock – used for adaptive clocking (supported on CTM and USB2/JTAG. *Note that not all ARM based MCUs implement this signal.
[*]nSRST Target System Reset
[*]DBGRQ Debug request.
[*]DBGACK Debug acknowledge
[/LIST]