--- /dev/null
+set _CHIPNAME avr
+set _ENDIAN little
+
+# jtag speed
+adapter_khz 4500
+
+# avr jtag docs never connect RSTN
+reset_config none
+
+#jtag scan chain
+if { [info exists CPUTAPID] } {
+ set _CPUTAPID $CPUTAPID
+} else {
+ set _CPUTAPID 0x0a70103f
+}
+jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME avr -endian $_ENDIAN -chain-position $_TARGETNAME
+
+set _FLASHNAME $_CHIPNAME.flash
+flash bank $_FLASHNAME avr 0 0 0 0 $_TARGETNAME