Did I damage my 7i73?

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27 May 2021 03:14 #210419 by tcninja
In my haste to try my new 7i73, I hooked up 5v
to In0-In2(3 position rotary switch) These were
Jog inc a-c. On Increment c my spindle turned on. I forgot my pull down/up resisters.
The encoder counters work fine yet
I haven’t installed the resistors and tested it further.

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27 May 2021 03:33 #210420 by BeagleBrainz
Replied by BeagleBrainz on topic Did I damage my 7i73?

In my haste to try my new 7i73, I hooked up 5v
to In0-In2(3 position rotary switch) These were
Jog inc a-c. On Increment c my spindle turned on. I forgot my pull down/up resisters.
The encoder counters work fine yet
I haven’t installed the resistors and tested it further.


Could be a HAL issue

Quoting the manual

INPUT CHARACTERISTICS
All inputs are LVTTL compatible (3.3V input maximum) except inputs 8 through 15.
Inputs 8 through 15 are 5V tolerant. Inputs 8 through 15 are also available as encoder
inputs. Inputs 8 through 15 have 4.7 K pull-up resistors so will read high when
unconnected. Inputs 0 through 7 are available as analog inputs. Inputs 0 through 7 have
no pull-up or pull-down resistors so present a minimal load on analog signals. If inputs 0
through 7 are used for switch sensing, external pull-up or pull-down resistors must be
added. The analog reference voltage is brought out on J2 pins 11 and 12 for ratiometric
measurement applications (like potentiometers). When keypad inputs are available as
input bits, they have 10K pull-ups, so will read high when unconnected.

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