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-rw-r--r--docs/Config_Reference.md29
1 files changed, 16 insertions, 13 deletions
diff --git a/docs/Config_Reference.md b/docs/Config_Reference.md
index 82264fd8..ded1f062 100644
--- a/docs/Config_Reference.md
+++ b/docs/Config_Reference.md
@@ -2650,10 +2650,11 @@ run_current:
#diag0_pin:
#diag1_pin:
# The micro-controller pin attached to one of the DIAG lines of the
-# TMC2130 chip. Only a single diag pin should be specified.
-# Setting this creates a "tmc2130_stepper_x:virtual_endstop" virtual
-# pin which may be used as the stepper's endstop_pin. Doing this
-# enables "sensorless homing". (Be sure to also set driver_SGT to an
+# TMC2130 chip. Only a single diag pin should be specified. The pin
+# is "active low" and is thus normally prefaced with "^!". Setting
+# this creates a "tmc2130_stepper_x:virtual_endstop" virtual pin
+# which may be used as the stepper's endstop_pin. Doing this enables
+# "sensorless homing". (Be sure to also set driver_SGT to an
# appropriate sensitivity value.) The default is to not enable
# sensorless homing.
```
@@ -2758,11 +2759,12 @@ run_current:
# above list.
#diag_pin:
# The micro-controller pin attached to the DIAG line of the TMC2209
-# chip. Setting this creates a "tmc2209_stepper_x:virtual_endstop"
-# virtual pin which may be used as the stepper's endstop_pin. Doing
-# this enables "sensorless homing". (Be sure to also set
-# driver_SGTHRS to an appropriate sensitivity value.) The default is
-# to not enable sensorless homing.
+# chip. The pin is normally prefaced with "^" to enable a pullup.
+# Setting this creates a "tmc2209_stepper_x:virtual_endstop" virtual
+# pin which may be used as the stepper's endstop_pin. Doing this
+# enables "sensorless homing". (Be sure to also set driver_SGTHRS to
+# an appropriate sensitivity value.) The default is to not enable
+# sensorless homing.
```
## [tmc2660]
@@ -2915,10 +2917,11 @@ run_current:
#diag0_pin:
#diag1_pin:
# The micro-controller pin attached to one of the DIAG lines of the
-# TMC5160 chip. Only a single diag pin should be specified.
-# Setting this creates a "tmc5160_stepper_x:virtual_endstop" virtual
-# pin which may be used as the stepper's endstop_pin. Doing this
-# enables "sensorless homing". (Be sure to also set driver_SGT to an
+# TMC5160 chip. Only a single diag pin should be specified. The pin
+# is "active low" and is thus normally prefaced with "^!". Setting
+# this creates a "tmc5160_stepper_x:virtual_endstop" virtual pin
+# which may be used as the stepper's endstop_pin. Doing this enables
+# "sensorless homing". (Be sure to also set driver_SGT to an
# appropriate sensitivity value.) The default is to not enable
# sensorless homing.
```