diff --git a/doc/nativeJtag/usb_connect.cfg b/doc/nativeJtag/usb_connect.cfg
new file mode 100644
index 0000000..09b75df
--- /dev/null
+++ b/doc/nativeJtag/usb_connect.cfg
@@ -0,0 +1,32 @@
+if [info exists env(SPINAL_SIM)] {
+    set SPINAL_SIM $::env(SPINAL_SIM)
+} else {
+    set SPINAL_SIM no
+}
+
+
+
+if {$SPINAL_SIM == "yes"} {
+    interface jtag_tcp
+    set _CHIPNAME fpga_spinal
+    set TAP_NAME $_CHIPNAME.bridge
+    set _CPUTAPID 0x10001fff
+    jtag newtap $_CHIPNAME bridge -expected-id $_CPUTAPID -irlen 4 -ircapture 0x1 -irmask 0xF
+    reset_config none
+    adapter_khz 50000
+} else {
+    interface ftdi
+    ftdi_device_desc "Digilent USB Device"
+    ftdi_vid_pid 0x0403 0x6010
+    ftdi_channel 0
+    ftdi_layout_init 0x00e8 0x60eb
+    ftdi_tdo_sample_edge falling
+
+    reset_config none
+    adapter_khz 50000
+
+    source [find cpld/xilinx-xc7.cfg]
+    source [find cpld/jtagspi.cfg]
+
+    set TAP_NAME xc7.tap
+}