stm32f2xxx: comments about frequency choice

2011-07-15 12:05:37 +02:00
parent f44bde23b9
commit e7269e32a7
2 changed files with 6 additions and 1 deletions
@@ -21,6 +21,11 @@ if { [info exists WORKAREASIZE] } {
 }

 # JTAG speed should be <= F_CPU/6. F_CPU after reset is 8MHz, so use F_JTAG = 1MHz
+#
+# 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.
 jtag_khz 1000

 jtag_nsrst_delay 100