LN-CB3S V1.0

by Unknown - product page

• Info & flashing guide
• Debugging

Information
Board code	ln-cb3s-v1.0
MCU	Lightning LN882HK
Series	LN882X
Partition layout	Tuya default (OTA 0x11A000, KV 0x1C5000)
Specifications
Frequency	160 MHz
Flash size	2 MiB
RAM size	295 KiB
Voltage	3.0V - 3.6V
I/O	13x GPIO, 2x UART, 5x ADC
Wi-Fi	802.11 b/g/n
Bluetooth	BLE v5.1

Usage

Board code: ln-cb3s-v1.0

In platformio.ini:

[env:ln-cb3s-v1.0]
platform = libretiny
board = ln-cb3s-v1.0
framework = arduino

Quick flashing guide

• ltchiptool user guide
• full flashing guide

Pin	Connection
PA03 / RX0	TX of USB-UART adapter
PA02 / TX0	RX of USB-UART adapter
PA09 / BOOT1 (strapping pin)	GND to enter download mode
CEN (Chip-Enable)	GND to reset the chip

1. Connect the USB-UART adapter.
2. Start the flashing process.
3. Connect PA09 (BOOT1) to GND.
4. Power-cycle the device or briefly short CEN to GND.

Pinout

Pin functions

Name(s)	UART	I²C	SPI	PWM	Other
PA00, ADC2
PA01, ADC3					SWDIO
PA02	TX0
PA03	RX0
PA04, ADC4					SWCLK
PA05
PA06
PA09
PA11
PB04, ADC6
PB05, ADC7
PB06
PB09	TX1

Flash memory map

Flash size: 2 MiB / 2,097,152 B / 0x200000

Hex values are in bytes.

Name	Code	Start	Length	End
Boot Image	boot	0x000000	24 KiB / 0x6000	0x006000
Partition Table	part_table	0x006000	4 KiB / 0x1000	0x007000
App Image	app	0x007000	1.1 MiB / 0x113000	0x11A000
OTA Image	ota	0x11A000	672 KiB / 0xA8000	0x1C2000
Lightning NV Store	ln_nvds	0x1C2000	12 KiB / 0x3000	0x1C5000
Lightning KV Store	ln_kv	0x1C5000	16 KiB / 0x4000	0x1C9000
LibreTiny Storage	kvs	0x1C9000	32 KiB / 0x8000	0x1D1000
User Data	userdata	0x1D1000	188 KiB / 0x2F000	0x200000
Tuya Storage	tuya	0x1EB000	84 KiB / 0x15000	0x200000