The Cypress CYW43438 is a highly integrated single-chip solution and offers the lowest RBOM in the industry for smartphones,
tablets, and a wide range of other portable devices. The chip includes a 2.4 GHz WLAN IEEE 802.11 b/g/n MAC/baseband/radio,
Bluetooth 4.1 support, and an FM receiver. In addition, it integrates a power amplifier (PA) that meets the output power requirements
of most handheld systems, a low-noise amplifier (LNA) for best-in-class receiver sensitivity, and an internal transmit/receive (iTR) RF
switch, further reducing the overall solution cost and printed circuit board area.
The WLAN host interface supports gSPI and SDIO v2.0 modes, providing a raw data transfer rate up to 200 Mbps when operating in
4-bit mode at a 50 MHz bus frequency. An independent, high-speed UART is provided for the Bluetooth/FM host interface.
Using advanced design techniques and process technology to reduce active and idle power, the CYW43438 is designed to address
the needs of highly mobile devices that require minimal power consumption and compact size. It includes a power management unit
that simplifies the system power topology and allows for operation directly from a rechargeable mobile platform battery while
maximizing battery life.
The CYW43438 implements the world’s most advanced Enhanced Collaborative Coexistence algorithms and hardware
mechanisms, allowing for an extremely collaborative WLAN and Bluetooth coexistence.
CS4398驱动参考us2167一些点 I2S up to 24bit data I2C formatGPIO口的配置也是通过对寄存器的写入来操作的 控制端口的时序以及SCL时钟频率。RST上升沿等等P16