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LilyGo logo

🌟LilyGo T-Watch-S3🌟

1 Overview

  • This page introduces the hardware parameters related to LilyGO T-Watch-S3
  /---------------------\
  |                     |
  |                     -
  |                    PWR  Button ───┐
  |      240 x 240      -             |
  |       (IPS)         |             |   Programmable, can monitor key status in program
  |                     -             └── In shutdown state, press 1 second to turn on
  |               Micro-USB ─┐        In the power-on state, press for 6 seconds to shut down 
  |                     |    |
  |                     |    |
  |                     |    |
  \---------------------/    └───────── Used for charging and programming    
                                        No external power supply function

✨ Hardware-Features

Features Params
SOC Espressif ESP32-S3
Flash 16MB(QSPI)
PSRAM 8MB (QSPI)
LoRa Semtech SX1262
Accelerometer sensor Bosch BMA423
Real-Time Clock NXP PCF8563
Power Manage X-Powers AXP2101
Haptic driver Ti DRV2605
PDM Microphone SPM1423HM4H-B
PCM Class D Amplifier Analog MAX98357A (3.2W Class D)
Capacitive Touch FT6336U
Infrared transmitter IR12-21C

✨ Display-Features

Features Params
Resolution 240 x 240
Display Size 1.3 Inch
Luminance on surface 450 cd/m²
Driver IC ST7789V3 (SPI)
Contrast ratio 800:1
Display Colors 262K
View Direction All (IPS)
Operating Temperature -20～70°C

📍 Pins Map

Name GPIO NUM Free
SDA 10 ❌
SCL 11 ❌
Touchpad(FT6336U) SDA 39 ❌
Touchpad(FT6336U) SCL 40 ❌
Touchpad(FT6336U) Interrupt 16 ❌
Touchpad(FT6336U) RESET Not Connected ❌
RTC(PCF8563) SDA Share with I2C bus ❌
RTC(PCF8563) SCL Share with I2C bus ❌
RTC(PCF8563) Interrupt 17 ❌
Sensor(BMA423) Interrupt 14 ❌
Sensor(BMA423) SDA Share with I2C bus ❌
Sensor(BMA423) SCL Share with I2C bus ❌
PCM Amplifier(MAX98357A) BCLK 48 ❌
PCM Amplifier(MAX98357A) WCLK 15 ❌
PCM Amplifier(MAX98357A) DOUT 46 ❌
LoRa(SX1262 or SX1280) SCK 3 ❌
LoRa(SX1262 or SX1280) MISO 4 ❌
LoRa(SX1262 or SX1280) MOSI 1 ❌
LoRa(SX1262 or SX1280) RESET 8 ❌
LoRa(SX1262 or SX1280) BUSY 7 ❌
LoRa(SX1262 or SX1280) CS 5 ❌
LoRa(SX1262 or SX1280) Interrupt 9 ❌
Display CS 12 ❌
Display MOSI 13 ❌
Display MISO Not Connected ❌
Display SCK 18 ❌
Display DC 38 ❌
Display RESET Not Connected ❌
Display Backlight 45 ❌
Charger(AXP2101) SDA Share with I2C bus ❌
Charger(AXP2101) SCL Share with I2C bus ❌
Charger(AXP2101) Interrupt 21 ❌
Haptic Driver(DRV2605) SDA Share with I2C bus ❌
Haptic Driver(DRV2605) SCL Share with I2C bus ❌
PDM Microphone(SPM1423HM4H) SCK 44 ❌
PDM Microphone(SPM1423HM4H) DATA 47 ❌
Infrared transmitter 2 ❌

🧑🏼‍🔧 I2C Devices Address

Devices 7-Bit Address Share Bus
Touch Panel FT6336U 0x38 ❌ Use Wire1
Accelerometer sensor BMA423 0x19 ✅️
Power Manager AXP2101 0x34 ✅️
Real-Time Clock PCF8563 0x51 ✅️
Haptic driver DRV2605 0x5A ✅️

⚡ PowerManage Channel

Channel Peripherals
DC1 ESP32-S3
DC2 Unused
DC3 Unused
DC4 Unused
DC5 Unused
LDO1(VRTC) Unused
ALDO1 Unused
ALDO2 Display Backlight
ALDO3 Display and Touch
ALDO4 LoRa
BLDO1 Unused
BLDO2 DRV2605 Enable
DLDO1 Unused
CPUSLDO Unused
VBACKUP RTC Button Battery

⚡ Electrical parameters

Features Details
🔗MicroUSB Input Voltage 3.9V-6V
⚡Charge Current 0-1024mA ((Programmable))
🔋Battery Voltage 3.8V
🔋Battery capacity 470mA

Important

⚠️ It is recommended to use a charging current below 130mA. Excessive charging current can damage the battery. If not in use for an extended period, turn the battery switch to OFF.

⚡ Power consumption reference

Mode Wake-Up Mode Current
Light-Sleep PowerButton + BootButton + TouchPanel 2.38mA
Light-Sleep PowerButton + BootButton N.A
DeepSleep PowerButton + BootButton (Backup power on) 530uA
DeepSleep PowerButton + BootButton (Backup power off) 460uA
DeepSleep TouchPanel 1.08mA
DeepSleep Timer (Backup power on) 510uA
DeepSleep Timer (Backup power off) 460uA
Power OFF Only keep the backup power 50uA
  • T-Watch-S3 does not have a touch reset pin connected, so if you set the touch screen to sleep, the touch will not work.

Resource