diff --git a/Marlin/src/HAL/DUE/pinsDebug.h b/Marlin/src/HAL/DUE/pinsDebug.h
index df1ba415e9..2aafe9be0c 100644
--- a/Marlin/src/HAL/DUE/pinsDebug.h
+++ b/Marlin/src/HAL/DUE/pinsDebug.h
@@ -70,7 +70,7 @@
 #define PRINT_PIN_ANALOG(p) do{ sprintf_P(buffer, PSTR(" (A%2d)  "), DIGITAL_PIN_TO_ANALOG_PIN(pin)); SERIAL_ECHO(buffer); }while(0)
 #define GET_ARRAY_PIN(p) pin_array[p].pin
 #define GET_ARRAY_IS_DIGITAL(p) pin_array[p].is_digital
-#define VALID_PIN(pin) (pin >= 0 && pin < (int8_t)NUMBER_PINS_TOTAL ? 1 : 0)
+#define VALID_PIN(pin) (pin >= 0 && pin < int8_t(NUMBER_PINS_TOTAL))
 #define DIGITAL_PIN_TO_ANALOG_PIN(p) int(p - analogInputToDigitalPin(0))
 #define IS_ANALOG(P) WITHIN(P, char(analogInputToDigitalPin(0)), char(analogInputToDigitalPin(NUM_ANALOG_INPUTS - 1)))
 #define pwm_status(pin) (((g_pinStatus[pin] & 0xF) == PIN_STATUS_PWM) && \
diff --git a/Marlin/src/HAL/SAMD51/pinsDebug.h b/Marlin/src/HAL/SAMD51/pinsDebug.h
index f0a46fd7c5..639c4cd66e 100644
--- a/Marlin/src/HAL/SAMD51/pinsDebug.h
+++ b/Marlin/src/HAL/SAMD51/pinsDebug.h
@@ -29,7 +29,7 @@
 #define PRINT_PIN_ANALOG(p) do{ sprintf_P(buffer, PSTR(" (A%2d)  "), DIGITAL_PIN_TO_ANALOG_PIN(pin)); SERIAL_ECHO(buffer); }while(0)
 #define GET_ARRAY_PIN(p) pin_array[p].pin
 #define GET_ARRAY_IS_DIGITAL(p) pin_array[p].is_digital
-#define VALID_PIN(pin) (pin >= 0 && pin < (int8_t)NUMBER_PINS_TOTAL)
+#define VALID_PIN(pin) (pin >= 0 && pin < int8_t(NUMBER_PINS_TOTAL))
 #define DIGITAL_PIN_TO_ANALOG_PIN(p) digitalPinToAnalogInput(p)
 #define IS_ANALOG(P) (DIGITAL_PIN_TO_ANALOG_PIN(P)!=-1)
 #define pwm_status(pin) digitalPinHasPWM(pin)
diff --git a/Marlin/src/HAL/STM32/pinsDebug.h b/Marlin/src/HAL/STM32/pinsDebug.h
index 55c64c8681..29a4e003f9 100644
--- a/Marlin/src/HAL/STM32/pinsDebug.h
+++ b/Marlin/src/HAL/STM32/pinsDebug.h
@@ -102,17 +102,18 @@ const XrefInfo pin_xref[] PROGMEM = {
 #define PIN_NUM_ALPHA_LEFT(P) (((P & 0x000F) < 10) ? ('0' + (P & 0x000F)) : '1')
 #define PIN_NUM_ALPHA_RIGHT(P) (((P & 0x000F) > 9)  ? ('0' + (P & 0x000F) - 10) : 0 )
 #define PORT_NUM(P) ((P  >> 4) & 0x0007)
-#define PORT_ALPHA(P) ('A' + (P  >> 4))
+#define PORT_ALPHA(P) ('A' + (P >> 4))
 
 /**
  * Translation of routines & variables used by pinsDebug.h
  */
 
-#if PA0 >= NUM_DIGITAL_PINS
+#if NUM_ANALOG_FIRST >= NUM_DIGITAL_PINS
   #define HAS_HIGH_ANALOG_PINS 1
 #endif
-#define NUMBER_PINS_TOTAL NUM_DIGITAL_PINS + TERN0(HAS_HIGH_ANALOG_PINS, NUM_ANALOG_INPUTS)
-#define VALID_PIN(ANUM) ((ANUM) >= 0 && (ANUM) < NUMBER_PINS_TOTAL)
+#define NUM_ANALOG_LAST ((NUM_ANALOG_FIRST) + (NUM_ANALOG_INPUTS) - 1)
+#define NUMBER_PINS_TOTAL ((NUM_DIGITAL_PINS) + TERN0(HAS_HIGH_ANALOG_PINS, NUM_ANALOG_INPUTS))
+#define VALID_PIN(P) (WITHIN(P, 0, (NUM_DIGITAL_PINS) - 1) || TERN0(HAS_HIGH_ANALOG_PINS, WITHIN(P, NUM_ANALOG_FIRST, NUM_ANALOG_LAST)))
 #define digitalRead_mod(Ard_num) extDigitalRead(Ard_num)  // must use Arduino pin numbers when doing reads
 #define PRINT_PIN(Q)
 #define PRINT_PIN_ANALOG(p) do{ sprintf_P(buffer, PSTR(" (A%2d)  "), DIGITAL_PIN_TO_ANALOG_PIN(pin)); SERIAL_ECHO(buffer); }while(0)
@@ -168,7 +169,7 @@ bool GET_PINMODE(const pin_t Ard_num) {
 }
 
 int8_t digital_pin_to_analog_pin(const pin_t Ard_num) {
-  if (WITHIN(Ard_num, NUM_ANALOG_FIRST, NUM_ANALOG_FIRST + NUM_ANALOG_INPUTS - 1))
+  if (WITHIN(Ard_num, NUM_ANALOG_FIRST, NUM_ANALOG_LAST))
     return Ard_num - NUM_ANALOG_FIRST;
 
   const uint32_t ind = digitalPinToAnalogInput(Ard_num);
@@ -206,8 +207,11 @@ void port_print(const pin_t Ard_num) {
     SERIAL_ECHO_SP(7);
 
   // Print number to be used with M42
-  int calc_p = Ard_num % (NUM_DIGITAL_PINS + 1);
-  if (Ard_num > NUM_DIGITAL_PINS && calc_p > 7) calc_p += 8;
+  int calc_p = Ard_num;
+  if (Ard_num > NUM_DIGITAL_PINS) {
+    calc_p -= NUM_ANALOG_FIRST;
+    if (calc_p > 7) calc_p += 8;
+  }
   SERIAL_ECHOPGM(" M42 P", calc_p);
   SERIAL_CHAR(' ');
   if (calc_p < 100) {
diff --git a/Marlin/src/HAL/TEENSY40_41/pinsDebug.h b/Marlin/src/HAL/TEENSY40_41/pinsDebug.h
index 94b85ea568..fc90f671cf 100644
--- a/Marlin/src/HAL/TEENSY40_41/pinsDebug.h
+++ b/Marlin/src/HAL/TEENSY40_41/pinsDebug.h
@@ -36,7 +36,7 @@
 #define PRINT_PIN_ANALOG(p) do{ sprintf_P(buffer, PSTR(" (A%2d)  "), DIGITAL_PIN_TO_ANALOG_PIN(pin)); SERIAL_ECHO(buffer); }while(0)
 #define GET_ARRAY_PIN(p) pin_array[p].pin
 #define GET_ARRAY_IS_DIGITAL(p) pin_array[p].is_digital
-#define VALID_PIN(pin) (pin >= 0 && pin < (int8_t)NUMBER_PINS_TOTAL ? 1 : 0)
+#define VALID_PIN(pin) (pin >= 0 && pin < int8_t(NUMBER_PINS_TOTAL))
 #define DIGITAL_PIN_TO_ANALOG_PIN(p) int(p - analogInputToDigitalPin(0))
 #define IS_ANALOG(P) ((P) >= analogInputToDigitalPin(0) && (P) <= analogInputToDigitalPin(13)) || ((P) >= analogInputToDigitalPin(14) && (P) <= analogInputToDigitalPin(17))
 #define pwm_status(pin) HAL_pwm_status(pin)
diff --git a/Marlin/src/gcode/config/M43.cpp b/Marlin/src/gcode/config/M43.cpp
index 688b94c9bf..cff143d571 100644
--- a/Marlin/src/gcode/config/M43.cpp
+++ b/Marlin/src/gcode/config/M43.cpp
@@ -313,7 +313,7 @@ void GcodeSuite::M43() {
 
   // 'P' Get the range of pins to test or watch
   uint8_t first_pin = PARSED_PIN_INDEX('P', 0),
-          last_pin = parser.seenval('P') ? first_pin : TERN(HAS_HIGH_ANALOG_PINS, NUM_DIGITAL_PINS, NUMBER_PINS_TOTAL) - 1;
+          last_pin = parser.seenval('P') ? first_pin : (NUMBER_PINS_TOTAL) - 1;
 
   if (first_pin > last_pin) return;
 
diff --git a/buildroot/share/PlatformIO/variants/MARLIN_G0B1RE/variant_MARLIN_STM32G0B1RE.h b/buildroot/share/PlatformIO/variants/MARLIN_G0B1RE/variant_MARLIN_STM32G0B1RE.h
index 9cb3d45a0d..6a26baff45 100644
--- a/buildroot/share/PlatformIO/variants/MARLIN_G0B1RE/variant_MARLIN_STM32G0B1RE.h
+++ b/buildroot/share/PlatformIO/variants/MARLIN_G0B1RE/variant_MARLIN_STM32G0B1RE.h
@@ -124,6 +124,7 @@
 #define NUM_DIGITAL_PINS        62
 #define NUM_REMAP_PINS          2
 #define NUM_ANALOG_INPUTS       16
+#define NUM_ANALOG_FIRST        PA0
 
 // SPI definitions
 #ifndef PIN_SPI_SS