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ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) — Symbol, Footprint IPC-7351B & 3D STEP Model

ESP32-WROVER-E-N4R8

ESPRESSIFID: C967023SMD,31.4x18mm · 39 Pins · Pitch 1.27mmIPC-7351B Verified5.0 (0)
SYNCHRONIZED 4D CROSS-PROBE MODETouch or hover any pin to highlight concurrently across Symbol, Footprint and 3D
1. SYMBOL
U1 · ESP32-WROVER-E-N4R8 (SMD,31.4x18mm)1MTDO23V33EN4SENSOR_VP5SENSOR_VN6IO347IO358IO329IO3310IO2511IO2612IO2713IO1414IO1215GND16IO1317NC*18NC*19NC*20NC*39GND38GND37IO2336IO2235TXD034RXD033IO2132NC31IO1930IO1829IO528NC27NC26IO425IO024IO223IO1522NC*21NC*Grid Pitch = 2.54mm (IEEE-315)-17.8-12.7-7.6-2.52.57.612.717.830.525.420.315.210.25.10-5.1-10.2-15.2-20.3-25.4-30.5mm
2. 2D FOOTPRINT
ANTENNA KEEPOUT (6.6mm)1234567891011121314151617181920212223242526272829303132333435363738393939393939393939E=18.00mm · Pitch e=1.27mmD=31.40mm-18-16-14-12-10-8-6-4-2024681012141618242220181614121086420-2-4-6-8-10-12-14-16-18-20-22-24mm
3. 3D CAD MODEL
Package Body: 18.00mm × 31.40mm · Pitch: 1.27mm · Ruler Step: 1.00mmSynced <100ms

Synchronized Pinout (Symbol / 2D / 3D) (39/39)

Touch or hover any pin to highlight concurrently across Symbol, Footprint and 3D
PinSymbolTypeFunction (EN)
1MTDOI/OMultiplexed I/O & Peripheral Pin MTDO (SWD/JTAG)
23V3PowerPower Supply Input (3V3 — 3.3V VDD3P3 (3.0V ~ 3.6V))
3ENISystem Enable & Hardware Reset (EN)
4SENSOR_VPIInput-Only Pin SENSOR_VP (ADC, RTC/CLK)
5SENSOR_VNIInput-Only Pin SENSOR_VN (ADC, RTC/CLK)
6IO34IInput-Only Pin IO34 (ADC, RTC/CLK)
7IO35IInput-Only Pin IO35 (ADC, RTC/CLK)
8IO32I/OMultiplexed I/O & Peripheral Pin IO32 (ADC, RTC/CLK, TOUCH)
9IO33I/OMultiplexed I/O & Peripheral Pin IO33 (ADC, RTC/CLK, TOUCH)
10IO25I/OMultiplexed I/O & Peripheral Pin IO25 (UART, ADC, DAC, RTC/CLK)
11IO26I/OMultiplexed I/O & Peripheral Pin IO26 (UART, ADC, DAC, RTC/CLK)
12IO27I/OMultiplexed I/O & Peripheral Pin IO27 (ADC, RTC/CLK, TOUCH)
13IO14I/OMultiplexed I/O & Peripheral Pin IO14 (ADC, SWD/JTAG, RTC/CLK, TOUCH)
14IO12I/OMultiplexed I/O & Peripheral Pin IO12 (ADC, SWD/JTAG, RTC/CLK, TOUCH)
15GNDGNDGround Reference Pin (GND)
16IO13I/OMultiplexed I/O & Peripheral Pin IO13 (ADC, SWD/JTAG, RTC/CLK, TOUCH)
17NC*I/OMultiplexed I/O & Peripheral Pin NC* (General)
18NC*I/OMultiplexed I/O & Peripheral Pin NC* (General)
19NC*I/OMultiplexed I/O & Peripheral Pin NC* (General)
20NC*I/OMultiplexed I/O & Peripheral Pin NC* (General)
21NC*I/OMultiplexed I/O & Peripheral Pin NC* (General)
22NC*I/OMultiplexed I/O & Peripheral Pin NC* (General)
23IO15I/OMultiplexed I/O & Peripheral Pin IO15 (ADC, SWD/JTAG, RTC/CLK, TOUCH)
24IO2I/OMultiplexed I/O & Peripheral Pin IO2 (ADC, RTC/CLK, TOUCH)
25IO0I/OMultiplexed I/O & Peripheral Pin IO0 (ADC, RTC/CLK, TOUCH)
26IO4I/OMultiplexed I/O & Peripheral Pin IO4 (ADC, RTC/CLK, TOUCH)
27NCI/OMultiplexed I/O & Peripheral Pin NC (General)
28NCI/OMultiplexed I/O & Peripheral Pin NC (General)
29IO5I/OMultiplexed I/O & Peripheral Pin IO5 (General)
30IO18I/OMultiplexed I/O & Peripheral Pin IO18 (General)
31IO19I/OMultiplexed I/O & Peripheral Pin IO19 (UART)
32NCI/OMultiplexed I/O & Peripheral Pin NC (General)
33IO21I/OMultiplexed I/O & Peripheral Pin IO21 (General)
34RXD0I/OMultiplexed I/O & Peripheral Pin RXD0 (UART)
35TXD0I/OMultiplexed I/O & Peripheral Pin TXD0 (UART)
36IO22I/OMultiplexed I/O & Peripheral Pin IO22 (UART)
37IO23I/OMultiplexed I/O & Peripheral Pin IO23 (General)
38GNDGNDGround Reference Pin (GND)
39GNDGNDExposed Thermal & Ground Pad (GND)
PIN 1 MTDO
I/O
Multiplexed I/O & Peripheral Pin MTDO (SWD/JTAG)
Design note: Signal terminal MTDO (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: MTDO. Supported peripheral buses: SWD/JTAG.
IPC-7351B Solder Density & Span C/G/Z Tuner

Live Embedded Datasheet PDF & Technical Drawing Gallery (6 Standard Drawings + 10 Extracted Figures)

Read the original datasheet PDF directly or click any drawing to view fullscreen
Open PDF in New Window ↗Read Datasheet PDF (.pdf)
PDF VIEWEROfficial Datasheet Document: ESP32-WROVER-E-N4R8 (ESPRESSIF · SMD,31.4x18mm)
Scroll, search text (Ctrl+F), or expand directly inside the embedded PDF reader below
1. Realistic 3D PackageREPRESENTATIVE
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) - 1. Realistic 3D Package
Detailed solid 3D bodyExpand ›
2. Standard Pinout (Top View)CLEANROOM PINOUT
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) - 2. Standard Pinout (Top View)
True package pinout (39 pins)Expand ›
3. Original Datasheet PinoutPDF PINOUT
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) - 3. Original Datasheet Pinout
Uncropped datasheet pin diagramExpand ›
4. Package Dimensions (D×E×A)PACKAGE DIMENSIONS
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) - 4. Package Dimensions (D×E×A)
SMD,31.4x18mm · 18.00×31.40mm · Pitch 1.27mmExpand ›
5. Recommended Land PatternLAND PATTERN
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) - 5. Recommended Land Pattern
IPC-7351B Footprint (47 Pads)Expand ›
6. Application SchematicSCHEMATIC
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) - 6. Application Schematic
Typical Application SchematicExpand ›
Original Datasheet Pinouts & Technical Drawings (10 figures · Page 1/1)
Showing 1–10 of 10 uncropped original figures for ESP32-WROVER
P20 · p20_fig01EXACT PACKAGE
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) — 图7: ESP32-WROVER-E 电路原理图
图7: ESP32-WROVER-E 电路原理图
P1 · p01_fig01642×314px
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) — 版本1.9 | 乐鑫信息科技 | 版权© 2023 NW ae 6)) Tae LAL ARAN © 2023
版本1.9 | 乐鑫信息科技 | 版权© 2023 NW ae 6)) Tae LAL ARAN © 2023
P20 · p20_fig021320×703px
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) — GND
GND
P21 · p21_fig011114×1009px
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) — 图8: ESP32-WROVER-IE 电路原理图
图8: ESP32-WROVER-IE 电路原理图
P21 · p21_fig021320×703px
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) — GND
GND
P22 · p22_fig011746×1064px
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) — 图9: 外围原理图
图9: 外围原理图
P22 · p22_fig01P22
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) — Datasheet Page 22 (p22_fig01)
Datasheet Page 22 (p22_fig01)
P23 · p23_fig011816×2273px
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) — 图11: ESP32-WROVER-IE 模组尺寸
图11: ESP32-WROVER-IE 模组尺寸
P24 · p24_fig011168×1587px
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) — 图12: PCB 封装图形
图12: PCB 封装图形
P24 · p24_fig01P24
ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) — Datasheet Page 24 (p24_fig01)
Datasheet Page 24 (p24_fig01)

Technical Specifications & Part Details (ESP32-WROVER-E-N4R8)

Summary of electrical parameters, mechanical dimensions, voltage range and peripheral interfaces from Datasheet (EN)
Wireless Wi-Fi / Bluetooth LE SoC Module
Detailed Overview:ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) is a 39-pin wireless wi-fi / bluetooth le soc module featuring a 31.40 × 18.00 × 3.30 mm mechanical envelope (lead pitch e = 1.27 mm). Rated for 3.0V ~ 3.6V (Typ 3.3V) supply operation across -40°C ~ +85°C (Industrial Grade) with integrated Wi-Fi, ADC, DAC, RTC/CLK, SWD/JTAG, TOUCH, UART interfaces.
Operating Supply VoltageV_CC / V_DD
3.0V ~ 3.6V (Typ 3.3V)
Place 100nF + 10µF X7R decoupling capacitors < 2mm from supply pins
Ambient Operating TemperatureT_A
-40°C ~ +85°C (Industrial Grade)
Industrial temperature grade; T_J(max) = +125°C
Clock / RF Operating Frequencyf_CLK / f_RF
2484 MHz
Extracted from authoritative PDF specification tables
Current & Power RatingI_OUT / I_CC
I_TX(peak) ≈ 310 mA @ 3.3V | Deep-Sleep ≈ 10 µA | I_GPIO(max) = 40 mA
Observe per-pin absolute maximum current limits
Package Envelope (D × E × A)D × E × A
31.40 × 18.00 × 3.30 mm (A1=0.00 mm)
Package family: CASTELLATED_MODULE (SMD,31.4x18mm)
Pin Count & Lead PitchN / e
39 Pins | Pitch e = 1.27 mm (50.0 mil)
Normalized to Center-to-Center Span C per IPC-7351B
Integrated Peripheral InterfacesBuses
Wi-Fi, ADC, DAC, RTC/CLK, SWD/JTAG, TOUCH, UART
Cross-linked with 4D Pinout & Schematic Symbol
Reflow & Moisture SensitivityIPC / MSL
IPC-7351B Level B | J-STD-020 (Peak 260°C) | MSL-3
60% windowed solder paste stencil on thermal EPAD
Engineering Safety Alert: Boot Strapping Pin Alert (MTDO, IO0): Do not force conflicting external pull-ups/pull-downs during POR reset.
Engineering Safety Alert: Connect exposed thermal pad (if present) to internal ground plane via 0.3mm stitched thermal vias.

5-Point Standards Verification

Automated compliance checks prior to export
5/5 PASS
IEEE-315 Symbol39 auto-grouped pins
OK
IPC-7351B Land Pattern47 pads · Pitch 1.27mm
OK
IPC-7525 60% Solder PasteEPAD 3.70×3.70mm windowed grid
OK
DFM Rules JLCPCB / PCBWayMin pad clearance: 0.25mm
OK
3D STEP AP214 & GLBAligned coordinate origin (0,0,0)
OK

Hardware Verification & Community Engineering Reviews

Summary of electrical parameters, mechanical dimensions, voltage range and peripheral interfaces from Datasheet
5.00 PCB Verified

Mechanical Dimensions & Land Pattern (SMD,31.4x18mm)

Extracted from Datasheet & IPC-7351B Normalized
mm
Package Body (D × E)Nominal
31.40 × 18.00 mm
Height (A) & Pitch (e)IPC-7351B
A=3.30mm · e=1.27mm
Pad Size (W × L)Level B
0.90 × 2.00 mm
Pins / Total PadsTopology
39P / 47Pad (CASTELLATED_MODULE)

Recommended Companion BOM & Drop-In Equivalents

Passive external components per reference schematic and 1:1 pin-compatible alternatives
DFM READY
Designator / Replacement MPNValue / PackageFunction & PCB Layout Rule
C1, C2
BOM
22µF (or 10µF) X5R + 100nF X7R
0805 + 0402
3V3 supply decoupling for ~500mA Wi-Fi TX bursts — place closest to 3V3 pin; supply must deliver >= 600mA.
R_en + C_en
BOM
R = 10kΩ to 3V3 + C = 1µF to GND
0402 / 0603
Power-On Reset RC delay at EN (CHIP_PU) — 1µF capacitor at EN is REQUIRED for reliable cold boot.
R_boot + SW1
BOM
10kΩ Pull-up + BOOT button
0402 + SMD
Firmware boot-mode strap (IO0 on ESP32/S2/S3, IO9 on ESP32-C3) — on C3 pull IO8 high via 10kΩ for UART/USB download.
D_esd
BOM
USBLC6-2SC6 / LESD5D5.0CT1G
SOT-23-6 / SOD-523
ESD surge protection on USB D+/D- — place right next to USB Type-C connector before IO18/IO19/IO20.
ESP32-S3-MINI-1-N8 / 1U-N4R2
Espressif
100% Drop-inSame 15.4×15.4mm 65-pad footprint as ESP32-S2-MINI-2 — verify USB GPIO 19/20 pin mapping.

Technical Frequently Asked Questions (FAQ) — ESP32-WROVER-E-N4R8 (SMD,31.4x18mm)

Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formats
IPC-7351B / IEEE-315

What is the Pinout and operating voltage specification of ESP32-WROVER-E-N4R8 (SMD,31.4x18mm)?

Manufactured by ESPRESSIF, the ESP32-WROVER-E-N4R8 is housed in a SMD,31.4x18mm package with 39 pins and a 1.27 mm lead pitch. Key pins include: 1 (MTDO: Multiplexed I/O & Peripheral Pin MTDO (SWD/JTAG)), 2 (3V3: Power Supply Input (3V3 — 3.3V VDD3P3 (3.0V ~ 3.6V))), 3 (EN: System Enable & Hardware Reset (EN)), 4 (SENSOR_VP: Input-Only Pin SENSOR_VP (ADC, RTC/CLK)), 5 (SENSOR_VN: Input-Only Pin SENSOR_VN (ADC, RTC/CLK)), 6 (IO34: Input-Only Pin IO34 (ADC, RTC/CLK)).

What are the IPC-7351B PCB Footprint dimensions for ESP32-WROVER-E-N4R8?

Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), ESP32-WROVER-E-N4R8 (SMD,31.4x18mm) has a nominal body envelope of 18.00 × 31.40 mm, pitch e = 1.27 mm, and 47 copper pads plus a central exposed thermal pad (EPAD) of 3.70 × 3.70 mm with a 60% IPC-7525 windowed solder paste grid.

Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for ESP32-WROVER-E-N4R8?

You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for ESP32-WROVER-E-N4R8 (ESPRESSIF, SMD,31.4x18mm) directly on this page, including KiCad 8 Footprints (.kicad_mod), Schematic Symbols (.kicad_sym), Autodesk Fusion 360 / Eagle (.lbr), and 3D STEP AP214 / WebGL GLB models.

Static Reference Appendix: Pinout Table (39 pins) & ESP32-WROVER Family VariantsExpand static table
Pin #Signal NameElectrical TypeFunctional Description & Design Notes
1MTDODigital_IOSignal terminal MTDO (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: MTDO. Supported peripheral buses: SWD/JTAG.
23V3Power_InPrimary positive power supply input (3V3) operating in the 3.3V VDD3P3 (3.0V ~ 3.6V) domain (Max rating: 3.6V).
3ENDigital_IOChip enable and power-on reset control input (EN): High enables the SoC; Low powers down the chip into reset.
4SENSOR_VPDigital_IOSignal terminal SENSOR_VP (I, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO36, ADC1_CH0, RTC_GPIO0. Supported peripheral buses: ADC, RTC/CLK.
5SENSOR_VNDigital_IOSignal terminal SENSOR_VN (I, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO39, ADC1_CH3, RTC_GPIO3. Supported peripheral buses: ADC, RTC/CLK.
6IO34Digital_IOSignal terminal IO34 (I, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO34, ADC1_CH6, RTC_GPIO4. Supported peripheral buses: ADC, RTC/CLK.
7IO35Digital_IOSignal terminal IO35 (I, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO35, ADC1_CH7, RTC_GPIO5. Supported peripheral buses: ADC, RTC/CLK.
8IO32Digital_IOSignal terminal IO32 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO32, ADC1_CH4, TOUCH9, RTC_GPIO9. Supported peripheral buses: ADC, RTC/CLK, TOUCH.
9IO33Digital_IOSignal terminal IO33 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO33, ADC1_CH5, TOUCH8, RTC_GPIO8. Supported peripheral buses: ADC, RTC/CLK, TOUCH.
10IO25Digital_IOSignal terminal IO25 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO25, ADC2_CH8, RTC_GPIO6. Supported peripheral buses: UART, ADC, DAC, RTC/CLK.
11IO26Digital_IOSignal terminal IO26 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO26, ADC2_CH9, RTC_GPIO7. Supported peripheral buses: UART, ADC, DAC, RTC/CLK.
12IO27Digital_IOSignal terminal IO27 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17. Supported peripheral buses: ADC, RTC/CLK, TOUCH.
13IO14Digital_IOSignal terminal IO14 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO14, ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS. Supported peripheral buses: ADC, SWD/JTAG, RTC/CLK, TOUCH.
14IO12Digital_IOSignal terminal IO12 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO12, ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI. Supported peripheral buses: ADC, SWD/JTAG, RTC/CLK, TOUCH.
15GNDGND0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks.
16IO13Digital_IOSignal terminal IO13 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO13, ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK. Supported peripheral buses: ADC, SWD/JTAG, RTC/CLK, TOUCH.
17NC*Digital_IOSignal terminal NC* (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: NC*. Supported peripheral buses: General.
18NC*Digital_IOSignal terminal NC* (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: NC*. Supported peripheral buses: General.
19NC*Digital_IOSignal terminal NC* (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: NC*. Supported peripheral buses: General.
20NC*Digital_IOSignal terminal NC* (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: NC*. Supported peripheral buses: General.
21NC*Digital_IOSignal terminal NC* (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: NC*. Supported peripheral buses: General.
22NC*Digital_IOSignal terminal NC* (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: NC*. Supported peripheral buses: General.
23IO15Digital_IOSignal terminal IO15 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO15, ADC2_CH3, TOUCH3, MTDO, RTC_GPIO13. Supported peripheral buses: ADC, SWD/JTAG, RTC/CLK, TOUCH.
24IO2Digital_IOSignal terminal IO2 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO2, ADC2_CH2, TOUCH2, RTC_GPIO12. Supported peripheral buses: ADC, RTC/CLK, TOUCH.
25IO0Digital_IOSignal terminal IO0 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO0, ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1. Supported peripheral buses: ADC, RTC/CLK, TOUCH.
26IO4Digital_IOSignal terminal IO4 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO4, ADC2_CH0, TOUCH0, RTC_GPIO10. Supported peripheral buses: ADC, RTC/CLK, TOUCH.
27NCNCSignal terminal NC (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
28NCNCSignal terminal NC (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
29IO5Digital_IOSignal terminal IO5 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO5. Supported peripheral buses: General.
30IO18Digital_IOSignal terminal IO18 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO18. Supported peripheral buses: General.
31IO19Digital_IOSignal terminal IO19 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO19, U0CTS. Supported peripheral buses: UART.
32NCNCSignal terminal NC (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: NC. Supported peripheral buses: General.
33IO21Digital_IOSignal terminal IO21 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO21. Supported peripheral buses: General.
34RXD0Digital_IOSignal terminal RXD0 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO3, U0RXD, CLK_OUT2. Supported peripheral buses: UART.
35TXD0Digital_IOSignal terminal TXD0 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO1, U0TXD, CLK_OUT3. Supported peripheral buses: UART.
36IO22Digital_IOSignal terminal IO22 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO22, U0RTS. Supported peripheral buses: UART.
37IO23Digital_IOSignal terminal IO23 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO23. Supported peripheral buses: General.
38GNDGND0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks.
39GNDGNDBottom exposed die attach pad (GND) providing primary thermal conduction path to the PCB and low-inductance 0V ground return.
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