User's Manual

SHENZHENSHI XINZHONGXIN TECHNOLOGY CO., LTD.
C-2L
(WiFi &BLE Module)
C-2S integrates Bluetooth dual-mode 5.1 and Wi-Fi 802.11n chip. It integrates the hardware and
software required to complete the Wi-Fi and Bluetooth applications, support AP and STA connection,
as well as the classic Bluetooth and BLE connection at the same time. The 32-bit MCU with Max
running speed of 120 MHz and the built-in 256 KB RAM allow it to support multi cloud connection,
and the MCU can also support audio decoding.
It has variety of peripherals, such as PWM, I2C, UART, SPI, SDIO and IrDA. You can download and
burn the program directly through UART. Up to six channels of 32-bit high-speed PWM output make
it suitable for high-quality LED control. Every 2 PWM can be configured as a phase controllable
differential mode to support motor and LED strip.
Priority based Wi Fi and Bluetooth coexistence control module is integrated internally to support
real-time priority and transceiver scheduling. BK7231M can provide the indication of transceiver
status of the current transceiver, so as to support external PA and LNA expansion.
It is embedded with EFUSE and supports OTP reading and writing in flash. It can be used to provide
unique serial number, code encryption and protect the security of debugging interface. The internal
integration of true random number generator and security module ensures the security of
communication and fast authentication and network connection.
Support low-power sleep mode, MCU can enter sleep mode and only needs micro ampere current.
The deep sleep mode supported by BK7231M can run a 32-bit clock under several microamps of
current, and can be awakened by this clock or any GPIO.
It supports not only the classic Bluetooth standard rate connection, but also all BLE 5.1 rates and
functions, including Long Range、High Data Rate and AOA / AOD positioning with up to four
antennas.
Features:
802.11 b/g/n 1x1 Compliant
20/40 MHz bandwidth and STBC
Working mode STA, AP, Direct and Repeater
SGI、Green-Field Preamble and A-MPDU
Support WPA, WPA2 and WAPI
Support 802.11e and WMM-PS
Up to 120 MHz for ARM968E-S MCU
In package 2Mbyte FLASH
On chip 256 Kbyte data RAM
50 MHz SDIO interface and SPI
Full speed USB host and device
Dual high speed UART
High speed I2C
Multi-channel 10bit ADC
Six 16-bits timer with PWM mode
Clock signal output
FCC standards: FCC CFR Title 47 Part 15 Subpart C Section 15.247
PCB antenna with antenna gain 0dBi