Wiring Diagram

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In case of low speed requirements, it is recommended to open the FEC function to improve
performance. Turn on FEC13 or FEC23 by writing the register reg0x03[5:4]. FEC13 has better
performance than FEC23, but the efficiency is also lower. It takes longer to send and receive the
same data.
8、How does the state enter sleep, how to wake up, and how
long does it take to wake up
Keep the SPI CS high and write reg0x01[15] as "1" to enter the sleep state. The SPI CS can wake
up from the sleep state for a period of time to enter the IDLE state. The awakening time is mainly
determined by the vibration and stability of the crystal, generally around 2ms.
9、How to prevent FIFO overflow
In sending or receiving data packets, in order to prevent spillage, FIFO can be set up by
reg0x24 register the corresponding threshold, more than the threshold, the chip will give
instructions, the indicator can be reg0x12 [13] FLAG (FIFO) to read.
10 、 Instructions for improving the working
reliability of the chip
In order to improve the reliability of the chip and the product yield, the following improvements
are recommended: 1. The optimized value of the 0x0a register is configured as 0x2403;
2. Before each start of sending and receiving, register 0x07 as 0x3f11 and then as 0x7f11 to
ensure that the VCO works in the best band every time it receives or sends.
Example:
write reg[0x07] = 0x3f11; write reg[0x07] = 0x7f11;
write reg[0x00] = 0x80XX(TX) or write reg[0x00] = 0x40XX(RX) [XX is the channel number]