diff options
| -rw-r--r-- | tcl/target/at91sam3XXX.cfg | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tcl/target/at91sam3XXX.cfg b/tcl/target/at91sam3XXX.cfg index a13e3990..98b508c4 100644 --- a/tcl/target/at91sam3XXX.cfg +++ b/tcl/target/at91sam3XXX.cfg @@ -29,6 +29,18 @@ if { [info exists ENDIAN] } { set _ENDIAN little } +# JTAG speed should be <= F_CPU/6. F_CPU after reset is 4 MHz, so use F_JTAG = 0.5MHz +# +# Since we may be running of an RC oscilator, we crank down the speed a +# bit more to be on the safe side. Perhaps superstition, but if are +# running off a crystal, we can run closer to the limit. Note +# that there can be a pretty wide band where things are more or less stable. + +adapter_khz 500 + +adapter_nsrst_delay 100 +jtag_ntrst_delay 100 + #jtag scan chain if { [info exists CPUTAPID] } { set _CPUTAPID $CPUTAPID |