Pin Functional Grouping

Thought for 1 sec

Set GND's Pin Type to "Ground"
Set GND's Section to "Ground"
Set GND's Pin Group to "GND"
Set GND's Pin Orientation to "Bottom"
Set GND's Sub-symbol Designator Suffix to "Power"
Set GND's Pin Description to "Ground reference"
Set 3V3's Pin Type to "Power In"
Set 3V3's Section to "Power"
Set 3V3's Pin Group to "3V3"
Set 3V3's Pin Orientation to "Top"
Set 3V3's Sub-symbol Designator Suffix to "Power"
Set 3V3's Pin Description to "3.3 V supply"
Set EN's Pin Type to "Input"
Set EN's Section to "Control"
Set EN's Pin Group to "EN"
Set EN's Pin Orientation to "Left"
Set EN's Sub-symbol Designator Suffix to "Control"
Set EN's Pin Description to "Chip enable input"
Set IO4's Pin Type to "Bi-Directional"
Set IO4's Section to "Analog"
Set IO4's Pin Group to "ADC1"
Set IO4's Pin Orientation to "Left"
Set IO4's Sub-symbol Designator Suffix to "Analog_ADC1"
Set IO4's Pin Description to "ADC1 touch GPIO"
Set IO5's Pin Type to "Bi-Directional"
Set IO5's Section to "Analog"
Set IO5's Pin Group to "ADC1"
Set IO5's Pin Orientation to "Left"
Set IO5's Sub-symbol Designator Suffix to "Analog_ADC1"
Set IO5's Pin Description to "ADC1 touch GPIO"
Set IO6's Pin Type to "Bi-Directional"
Set IO6's Section to "Analog"
Set IO6's Pin Group to "ADC1"
Set IO6's Pin Orientation to "Left"
Set IO6's Sub-symbol Designator Suffix to "Analog_ADC1"
Set IO6's Pin Description to "ADC1 touch GPIO"
Set IO7's Pin Type to "Bi-Directional"
Set IO7's Section to "Analog"
Set IO7's Pin Group to "ADC1"
Set IO7's Pin Orientation to "Left"
Set IO7's Sub-symbol Designator Suffix to "Analog_ADC1"
Set IO7's Pin Description to "ADC1 touch GPIO"
Set IO15's Pin Type to "Bi-Directional"
Set IO15's Section to "Analog"
Set IO15's Pin Group to "ADC2"
Set IO15's Pin Orientation to "Left"
Set IO15's Sub-symbol Designator Suffix to "Analog_ADC2"
Set IO15's Pin Description to "ADC2 touch GPIO"
Set IO16's Pin Type to "Bi-Directional"
Set IO16's Section to "Analog"
Set IO16's Pin Group to "ADC2"
Set IO16's Pin Orientation to "Left"
Set IO16's Sub-symbol Designator Suffix to "Analog_ADC2"
Set IO16's Pin Description to "ADC2 touch GPIO"
Set IO17's Pin Type to "Bi-Directional"
Set IO17's Section to "Analog"
Set IO17's Pin Group to "ADC2"
Set IO17's Pin Orientation to "Left"
Set IO17's Sub-symbol Designator Suffix to "Analog_ADC2"
Set IO17's Pin Description to "ADC2 UART GPIO"
Set IO18's Pin Type to "Bi-Directional"
Set IO18's Section to "Analog"
Set IO18's Pin Group to "ADC2"
Set IO18's Pin Orientation to "Left"
Set IO18's Sub-symbol Designator Suffix to "Analog_ADC2"
Set IO18's Pin Description to "ADC2 UART GPIO"
Set IO8's Pin Type to "Bi-Directional"
Set IO8's Section to "Analog"
Set IO8's Pin Group to "ADC1"
Set IO8's Pin Orientation to "Left"
Set IO8's Sub-symbol Designator Suffix to "Analog_ADC1"
Set IO8's Pin Description to "ADC1 touch GPIO"
Set IO19's Pin Type to "Bi-Directional"
Set IO19's Section to "USB"
Set IO19's Pin Group to "USB"
Set IO19's Pin Orientation to "Left"
Set IO19's Sub-symbol Designator Suffix to "Communication"
Set IO19's Pin Description to "USB D minus"
Set IO20's Pin Type to "Bi-Directional"
Set IO20's Section to "USB"
Set IO20's Pin Group to "USB"
Set IO20's Pin Orientation to "Left"
Set IO20's Sub-symbol Designator Suffix to "Communication"
Set IO20's Pin Description to "USB D plus"
Set IO3's Pin Type to "Bi-Directional"
Set IO3's Section to "Analog"
Set IO3's Pin Group to "ADC1"
Set IO3's Pin Orientation to "Left"
Set IO3's Sub-symbol Designator Suffix to "Analog_ADC1"
Set IO3's Pin Description to "ADC1 touch GPIO"
Set IO46's Pin Type to "Bi-Directional"
Set IO46's Section to "GPIO"
Set IO46's Pin Group to "GPIO"
Set IO46's Pin Orientation to "Left"
Set IO46's Sub-symbol Designator Suffix to "GPIO"
Set IO46's Pin Description to "Strapping GPIO"
Set IO9's Pin Type to "Bi-Directional"
Set IO9's Section to "Communication"
Set IO9's Pin Group to "SPI"
Set IO9's Pin Orientation to "Left"
Set IO9's Sub-symbol Designator Suffix to "SPI"
Set IO9's Pin Description to "SPI GPIO signal"
Set IO10's Pin Type to "Bi-Directional"
Set IO10's Section to "Communication"
Set IO10's Pin Group to "SPI"
Set IO10's Pin Orientation to "Left"
Set IO10's Sub-symbol Designator Suffix to "SPI"
Set IO10's Pin Description to "SPI GPIO signal"
Set IO11's Pin Type to "Bi-Directional"
Set IO11's Section to "Communication"
Set IO11's Pin Group to "SPI"
Set IO11's Pin Orientation to "Left"
Set IO11's Sub-symbol Designator Suffix to "SPI"
Set IO11's Pin Description to "SPI GPIO signal"
Set IO12's Pin Type to "Bi-Directional"
Set IO12's Section to "Communication"
Set IO12's Pin Group to "SPI"
Set IO12's Pin Orientation to "Left"
Set IO12's Sub-symbol Designator Suffix to "SPI"
Set IO12's Pin Description to "SPI clock GPIO"
Set IO13's Pin Type to "Bi-Directional"
Set IO13's Section to "Communication"
Set IO13's Pin Group to "SPI"
Set IO13's Pin Orientation to "Left"
Set IO13's Sub-symbol Designator Suffix to "SPI"
Set IO13's Pin Description to "SPI GPIO signal"
Set IO14's Pin Type to "Bi-Directional"
Set IO14's Section to "Communication"
Set IO14's Pin Group to "SPI"
Set IO14's Pin Orientation to "Left"
Set IO14's Sub-symbol Designator Suffix to "SPI"
Set IO14's Pin Description to "SPI GPIO signal"
Set IO21's Pin Type to "Bi-Directional"
Set IO21's Section to "GPIO"
Set IO21's Pin Group to "GPIO"
Set IO21's Pin Orientation to "Left"
Set IO21's Sub-symbol Designator Suffix to "GPIO"
Set IO21's Pin Description to "General purpose GPIO"
Set IO47's Pin Type to "Bi-Directional"
Set IO47's Section to "Communication"
Set IO47's Pin Group to "SPI_DIFF"
Set IO47's Pin Orientation to "Left"
Set IO47's Sub-symbol Designator Suffix to "SPI"
Set IO47's Pin Description to "Differential SPI clock P"
Set IO48's Pin Type to "Bi-Directional"
Set IO48's Section to "Communication"
Set IO48's Pin Group to "SPI_DIFF"
Set IO48's Pin Orientation to "Left"
Set IO48's Sub-symbol Designator Suffix to "SPI"
Set IO48's Pin Description to "Differential SPI clock N"
Set IO45's Pin Type to "Bi-Directional"
Set IO45's Section to "GPIO"
Set IO45's Pin Group to "GPIO"
Set IO45's Pin Orientation to "Left"
Set IO45's Sub-symbol Designator Suffix to "GPIO"
Set IO45's Pin Description to "Strapping GPIO"
Set IO0's Pin Type to "Bi-Directional"
Set IO0's Section to "GPIO"
Set IO0's Pin Group to "GPIO"
Set IO0's Pin Orientation to "Left"
Set IO0's Sub-symbol Designator Suffix to "GPIO"
Set IO0's Pin Description to "Boot strapping GPIO"
Set IO35's Pin Type to "Bi-Directional"
Set IO35's Section to "Communication"
Set IO35's Pin Group to "SPI"
Set IO35's Pin Orientation to "Left"
Set IO35's Sub-symbol Designator Suffix to "SPI"
Set IO35's Pin Description to "SPI PSRAM GPIO"
Set IO36's Pin Type to "Bi-Directional"
Set IO36's Section to "Communication"
Set IO36's Pin Group to "SPI"
Set IO36's Pin Orientation to "Left"
Set IO36's Sub-symbol Designator Suffix to "SPI"
Set IO36's Pin Description to "SPI clock GPIO"
Set IO37's Pin Type to "Bi-Directional"
Set IO37's Section to "Communication"
Set IO37's Pin Group to "SPI"
Set IO37's Pin Orientation to "Left"
Set IO37's Sub-symbol Designator Suffix to "SPI"
Set IO37's Pin Description to "SPI data strobe"
Set IO38's Pin Type to "Bi-Directional"
Set IO38's Section to "Communication"
Set IO38's Pin Group to "SPI"
Set IO38's Pin Orientation to "Left"
Set IO38's Sub-symbol Designator Suffix to "SPI"
Set IO38's Pin Description to "SPI write protect"
Set IO39's Pin Type to "Bi-Directional"
Set IO39's Section to "Debug"
Set IO39's Pin Group to "JTAG"
Set IO39's Pin Orientation to "Left"
Set IO39's Sub-symbol Designator Suffix to "Debug"
Set IO39's Pin Description to "JTAG MTCK GPIO"
Set IO40's Pin Type to "Bi-Directional"
Set IO40's Section to "Debug"
Set IO40's Pin Group to "JTAG"
Set IO40's Pin Orientation to "Left"
Set IO40's Sub-symbol Designator Suffix to "Debug"
Set IO40's Pin Description to "JTAG MTDO GPIO"
Set IO41's Pin Type to "Bi-Directional"
Set IO41's Section to "Debug"
Set IO41's Pin Group to "JTAG"
Set IO41's Pin Orientation to "Left"
Set IO41's Sub-symbol Designator Suffix to "Debug"
Set IO41's Pin Description to "JTAG MTDI GPIO"
Set IO42's Pin Type to "Bi-Directional"
Set IO42's Section to "Debug"
Set IO42's Pin Group to "JTAG"
Set IO42's Pin Orientation to "Left"
Set IO42's Sub-symbol Designator Suffix to "Debug"
Set IO42's Pin Description to "JTAG MTMS GPIO"
Set RXD0's Pin Type to "Bi-Directional"
Set RXD0's Section to "Communication"
Set RXD0's Pin Group to "UART0"
Set RXD0's Pin Orientation to "Left"
Set RXD0's Sub-symbol Designator Suffix to "Communication"
Set RXD0's Pin Description to "UART0 receive GPIO"
Set TXD0's Pin Type to "Bi-Directional"
Set TXD0's Section to "Communication"
Set TXD0's Pin Group to "UART0"
Set TXD0's Pin Orientation to "Right"
Set TXD0's Sub-symbol Designator Suffix to "Communication"
Set TXD0's Pin Description to "UART0 transmit GPIO"
Set IO2's Pin Type to "Bi-Directional"
Set IO2's Section to "Analog"
Set IO2's Pin Group to "ADC1"
Set IO2's Pin Orientation to "Left"
Set IO2's Sub-symbol Designator Suffix to "Analog_ADC1"
Set IO2's Pin Description to "ADC1 touch GPIO"
Set IO1's Pin Type to "Bi-Directional"
Set IO1's Section to "Analog"
Set IO1's Pin Group to "ADC1"
Set IO1's Pin Orientation to "Left"
Set IO1's Sub-symbol Designator Suffix to "Analog_ADC1"
Set IO1's Pin Description to "ADC1 touch GPIO"
Set GND's Pin Type to "Ground"
Set GND's Section to "Ground"
Set GND's Pin Group to "GND"
Set GND's Pin Orientation to "Bottom"
Set GND's Sub-symbol Designator Suffix to "Power"
Set GND's Pin Description to "Ground reference"

Thought

Removed GND::7ce78bc6
Removed GND::2388ae88
Removed GND::8ade24ee
Removed GND::2adf9b55
Removed GND::300bab57
Removed GND::c16c83e3
Removed GND::c2ce428b
Removed GND::6199228c

⚠️ Removed components had their net connections destroyed. Use the @schematic tool (with includeNets) to verify connectivity and re-wire any lost connections.

Thought

flux

Set GND's Pin Type to "Ground"
Set GND's Section to "Ground"
Set GND's Pin Group to "GND"
Set GND's Pin Orientation to "Bottom"
Set GND's Sub-symbol Designator Suffix to "Power"
Set GND's Pin Description to "Exposed ground pad"

Thought for 2 sec

flux

Applied the datasheet-derived grouping rule to the ESP32-S3-WROOM-1-N8R2 terminals: all valid 41 datasheet pins now have Section, Pin Group, Pin Orientation, and Sub-symbol Designator Suffix assignments, and the duplicate out-of-range GND terminals were removed. I also updated the ESP32-S3-WROOM-1-N8R2 Pin Functional Groups project file with the applied rule summary.

Run ERC check

Show mapping table

Check terminal properties

Export metadata

Files

Pins

Symbol

Layout

Preview

IO40

IO12

IO13

IO39

IO19

IO9

IO6

IO48

IO37

IO2

IO16

IO3

IO42

IO47

IO0

IO46

IO35

TXD0

IO20

IO45

IO1

IO18

IO36

IO17

IO8

GND

IO4

IO10

IO7

IO11

3V3

IO14

IO41

IO21

RXD0

GND

IO38

IO15

GND

IO5

ESP32-S3-WROOM-1-N8R2 Pin Functional Groups

Source: Espressif ESP32-S3-WROOM-1 / WROOM-1U datasheet, Table 3-1 Pin Definitions. The module has 41 pins. Each physical pin is assigned to exactly one primary functional group below, even when the datasheet lists multiple alternate functions.

Grouping rule

For multi-function GPIO pins, I assigned each pin to the most common / most identifying function family shown in the datasheet:

Supply and ground pins are grouped first.
EN is grouped as Control.
USB D-/D+ pins are grouped as USB instead of general GPIO.
UART0 dedicated labels RXD0/TXD0 are grouped as UART0.
MTCK/MTDO/MTDI/MTMS pins are grouped as JTAG / Debug.
Pins with ADC/TOUCH/RTC functions are grouped by ADC bank where possible.
FSPI/SUBSPI-capable pins are grouped as SPI / Flash-PSRAM Expansion where that is their most distinguishing shared function.
Remaining plain GPIO-only pins are grouped as General GPIO.

Power

Table

Pin name	Pin no.	Datasheet function	Suggested section	Suggested pin group	Flux pin type
3V3	2	Power supply	Power	3V3	Power In

Ground

Table

Pin name	Pin no.	Datasheet function	Suggested section	Suggested pin group	Flux pin type
GND	1	GND	Ground	GND	Ground
GND	40	GND	Ground	GND	Ground
EPAD	41	GND	Ground	GND	Ground

Control / Enable

Table

Pin name	Pin no.	Datasheet function	Suggested section	Suggested pin group	Flux pin type
EN	3	High: on, enables the chip. Low: off, chip powers off. Do not leave floating.	Control	EN	Input

USB

Table

Pin name	Pin no.	Datasheet function	Suggested section	Suggested pin group	Flux pin type
IO19	13	RTC_GPIO19, GPIO19, U1RTS, ADC2_CH8, CLK_OUT2, USB_D-	USB	USB	Bi-Directional
IO20	14	RTC_GPIO20, GPIO20, U1CTS, ADC2_CH9, CLK_OUT1, USB_D+	USB	USB	Bi-Directional

UART0 / Programming Console

Table

Pin name	Pin no.	Datasheet function	Suggested section	Suggested pin group	Flux pin type
RXD0	36	U0RXD, GPIO44, CLK_OUT2	Communication	UART0	Bi-Directional
TXD0	37	U0TXD, GPIO43, CLK_OUT1	Communication	UART0	Bi-Directional

JTAG / Debug

Table

Pin name	Pin no.	Datasheet function	Suggested section	Suggested pin group	Flux pin type
IO39	32	MTCK, GPIO39, CLK_OUT3, SUBSPICS1	Debug	JTAG	Bi-Directional
IO40	33	MTDO, GPIO40, CLK_OUT2	Debug	JTAG	Bi-Directional
IO41	34	MTDI, GPIO41, CLK_OUT1	Debug	JTAG	Bi-Directional
IO42	35	MTMS, GPIO42	Debug	JTAG	Bi-Directional

ADC1 / Touch / RTC GPIO

Table

Pin name	Pin no.	Datasheet function	Suggested section	Suggested pin group	Flux pin type
IO1	39	RTC_GPIO1, GPIO1, TOUCH1, ADC1_CH0	Analog	ADC1	Bi-Directional
IO2	38	RTC_GPIO2, GPIO2, TOUCH2, ADC1_CH1	Analog	ADC1	Bi-Directional
IO3	15	RTC_GPIO3, GPIO3, TOUCH3, ADC1_CH2	Analog	ADC1	Bi-Directional
IO4	4	RTC_GPIO4, GPIO4, TOUCH4, ADC1_CH3	Analog	ADC1	Bi-Directional
IO5	5	RTC_GPIO5, GPIO5, TOUCH5, ADC1_CH4	Analog	ADC1	Bi-Directional
IO6	6	RTC_GPIO6, GPIO6, TOUCH6, ADC1_CH5	Analog	ADC1	Bi-Directional
IO7	7	RTC_GPIO7, GPIO7, TOUCH7, ADC1_CH6	Analog	ADC1	Bi-Directional
IO8	12	RTC_GPIO8, GPIO8, TOUCH8, ADC1_CH7, SUBSPICS1	Analog	ADC1	Bi-Directional

ADC2 / Touch / RTC GPIO

Table

Pin name	Pin no.	Datasheet function	Suggested section	Suggested pin group	Flux pin type
IO15	8	RTC_GPIO15, GPIO15, U0RTS, ADC2_CH4, XTAL_32K_P	Analog	ADC2	Bi-Directional
IO16	9	RTC_GPIO16, GPIO16, U0CTS, ADC2_CH5, XTAL_32K_N	Analog	ADC2	Bi-Directional
IO17	10	RTC_GPIO17, GPIO17, U1TXD, ADC2_CH6	Analog	ADC2	Bi-Directional
IO18	11	RTC_GPIO18, GPIO18, U1RXD, ADC2_CH7, CLK_OUT3	Analog	ADC2	Bi-Directional

SPI / Flash-PSRAM Expansion

Table

Pin name	Pin no.	Datasheet function	Suggested section	Suggested pin group	Flux pin type
IO9	17	RTC_GPIO9, GPIO9, TOUCH9, ADC1_CH8, FSPIHD, SUBSPIHD	Communication	SPI	Bi-Directional
IO10	18	RTC_GPIO10, GPIO10, TOUCH10, ADC1_CH9, FSPICS0, FSPIIO4, SUBSPICS0	Communication	SPI	Bi-Directional
IO11	19	RTC_GPIO11, GPIO11, TOUCH11, ADC2_CH0, FSPID, FSPIIO5, SUBSPID	Communication	SPI	Bi-Directional
IO12	20	RTC_GPIO12, GPIO12, TOUCH12, ADC2_CH1, FSPICLK, FSPIIO6, SUBSPICLK	Communication	SPI	Bi-Directional
IO13	21	RTC_GPIO13, GPIO13, TOUCH13, ADC2_CH2, FSPIQ, FSPIIO7, SUBSPIQ	Communication	SPI	Bi-Directional
IO14	22	RTC_GPIO14, GPIO14, TOUCH14, ADC2_CH3, FSPIWP, FSPIDQS, SUBSPIWP	Communication	SPI	Bi-Directional
IO35	28	SPIIO6, GPIO35, FSPID, SUBSPID	Communication	SPI	Bi-Directional
IO36	29	SPIIO7, GPIO36, FSPICLK, SUBSPICLK	Communication	SPI	Bi-Directional
IO37	30	SPIDQS, GPIO37, FSPIQ, SUBSPIQ	Communication	SPI	Bi-Directional
IO38	31	GPIO38, FSPIWP, SUBSPIWP	Communication	SPI	Bi-Directional
IO47	24	SPICLK_P_DIFF, GPIO47, SUBSPICLK_P_DIFF	Communication	SPI_DIFF	Bi-Directional
IO48	25	SPICLK_N_DIFF, GPIO48, SUBSPICLK_N_DIFF	Communication	SPI_DIFF	Bi-Directional

General GPIO / Boot-Strap Style GPIO

Table

Pin name	Pin no.	Datasheet function	Suggested section	Suggested pin group	Flux pin type
IO0	27	RTC_GPIO0, GPIO0	GPIO	GPIO	Bi-Directional
IO21	23	RTC_GPIO21, GPIO21	GPIO	GPIO	Bi-Directional
IO45	26	GPIO45	GPIO	GPIO	Bi-Directional
IO46	16	GPIO46	GPIO	GPIO	Bi-Directional

Count check

Power: 1 pin
Ground: 3 pins
Control: 1 pin
USB: 2 pins
UART0: 2 pins
JTAG / Debug: 4 pins
ADC1 / Touch / RTC GPIO: 8 pins
ADC2 / Touch / RTC GPIO: 4 pins
SPI / Flash-PSRAM Expansion: 12 pins
General GPIO: 4 pins
Total: 41 unique physical pins

No pin is repeated across groups in this list.

Applied terminal property rule

The project terminals have been updated to follow this one-pin-one-group mapping:

Section is the primary functional section from the table above.
Pin Group is the unique common function group chosen for that physical pin.
Pin Orientation follows Flux IC symbol rules: power at Top, ground at Bottom, bidirectional/control pins at Left, and TXD0 at Right.
Sub-symbol Designator Suffix splits the 41-pin module into Power, Control, Communication, Debug, Analog_ADC1, Analog_ADC2, SPI, and GPIO blocks.
Extra duplicate GND terminals that were numbered outside the datasheet pin range were removed so the part project now matches the 41 datasheet pins.

Datasheet notes to preserve

Type legend: P = power supply; I = input; O = output; T = high impedance.
For pins 28–30, the default function is decided by eFuse bit.
For modules with Octal SPI PSRAM, pins IO35, IO36, and IO37 are connected to the Octal SPI PSRAM and are not available for other uses. The ESP32-S3-WROOM-1-N8R2 variant has 2 MB PSRAM; verify the exact internal PSRAM interface before exposing those pins as user GPIO in a design.
For ESP32-S3R16V-based modules, GPIO47 and GPIO48 use 1.8 V logic because VDD_SPI is 1.8 V. This note is listed in the shared datasheet but may not apply to the N8R2 variant.

Grouping rule
Power
Ground
Control / Enable
USB
UART0 / Programming Console
JTAG / Debug
ADC1 / Touch / RTC GPIO
ADC2 / Touch / RTC GPIO
SPI / Flash-PSRAM Expansion
General GPIO / Boot-Strap Style GPIO
Count check
Applied terminal property rule
Datasheet notes to preserve