CYRF8935 WirelessUSB NL 2.4 GHz Low Power Radio WirelessUSB NL 2.4 GHz Low Power Radio using a differentiated single-mixer, closed-loop modulation Features design that optimizes power efficiency and interference immunity. Closed-loop modulation effectively eliminates the Fully integrated 2.4 GHz radio on a chip problem of frequency drift, enabling WirelessUSB-NL to transmit 1 Mbps over-the-air data rate up to 255-byte payloads without repeatedly having to pay power penalties for re-locking the phase locked loop (PLL) as in Transmit power typical: 0 dBm open-loop designs. Receive sensitivity typical: 87 dBm Among the advantages of WirelessUSB-NL are its fast lock times 1 and channel switching, along with the ability to transmit larger 1 A typical current consumption in sleep state payloads. Use of longer payload packets, compared to multiple Closed-loop frequency synthesis short payload packets, can reduce overhead, improve overall power efficiency, and help alleviate spectrum crowding. Supports frequency-hopping spread spectrum Combined with Cypress s enCoRe family of USB and wireless On-chip packet framer with 64-byte first in first out (FIFO) data microcontrollers, WirelessUSB-NL also provides the lowest bill buffer of materials (BOM) cost solution for PC peripheral applications such as wireless keyboards and mice, as well as best-in-class Built-in auto-retry-acknowledge protocol simplifies usage wireless performance in other demanding applications such as Built-in cyclic redundancy check (CRC), forward error toys, remote controls, fitness, automation, presenter tools, and correction (FEC), data whitening gaming. Supports DC ~ 12 MHz SPI bus interface Applications Additional outputs for interrupt request (IRQ) generation Wireless keyboards and mice Digital readout of received signal strength indication (RSSI) Handheld remote controls 4 4 mm quad flat no-leads (QFN) package, bare die, or wafer sales Wireless game controllers Hobby craft control links Functional Description Home automation WirelessUSB-NL, optimized to operate in the 2.4-GHz ISM Industrial wireless links and networks band, is Cypress s third generation of 2.4-GHz low-power RF technology, bringing the next level of low-power performance Cordless audio and low-rate video into a small 4-mm4-mm footprint. WirelessUSB-NL implements a Gaussian frequency-shift keying (GFSK) radio Note 1. Typical values are included for reference only and are not guaranteed or tested. Typical values are measured at V = 3 VDC, Ta = +25 C. IN Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 001-61351 Rev. *K Revised May 19, 2017 Not recommended for new designsCYRF8935 Logic Block Diagram V ...V V V DD1 DD7 IN OUT V DD IO LDO Linear GFSK Regulator Modulator PKT PA FIFO SPI SS ANT CLK VCO Synthesizer ANTb MISO MOSI RST n Pwr/ Reset 2 BRCLK GFSK X Xtal Osc Demodulator LNA + BPF Image Rej. Mxr. XTALi XTALo GND GND Note 2. BRCLK signal is available on bare die only, not packaged parts. Document Number: 001-61351 Rev. *K Page 2 of 40 SPI Registers Framer Not recommended for new designs