PDF CYRF7936 Data sheet ( Hoja de datos )

Número de pieza	CYRF7936
Descripción	2.4 GHz CyFi Transceiver
Fabricantes	Cypress Semiconductor
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No Preview Available ! www.DataSheet4U.com CYRF7936 2.4 GHz CyFi™ Transceiver Features ■ 2.4 GHz Direct Sequence Spread Spectrum (DSSS) radio transceiver ■ Operates in the unlicensed worldwide Industrial, Scientific, and Medical (ISM) band (2.400 GHz – 2.483 GHz) ■ 21 mA operating current (Transmit at –5 dBm) ■ Transmit power up to +4 dBm ■ Receive sensitivity up to –97 dBm ■ Sleep Current <1 μA ■ DSSS data rates up to 250 kbps, GFSK data rate of 1 Mbps ■ Low external component count ■ Auto Transaction Sequencer (ATS) - no MCU intervention ■ Framing, Length, CRC16, and Auto ACK ■ Power Management Unit (PMU) for MCU ■ Fast Startup and Fast Channel Changes ■ Separate 16-byte Transmit and Receive FIFOs ■ Dynamic data rate reception ■ Receive Signal Strength Indication (RSSI) ■ Serial Peripheral Interface (SPI) control while in sleep mode ■ 4 MHz SPI microcontroller interface ■ Battery Voltage Monitoring Circuitry ■ Supports coin-cell operated applications ■ Operating voltage from 1.8V to 3.6V ■ Operating temperature from 0 to 70°C ■ Space saving 40-pin QFN 6x6 mm package Applications ■ Wireless Sensor Networks ■ Wireless Actuator Control ■ Home Automation ■ White Goods ■ Commercial Building Automation ■ Automatic Meter Readers ■ Precision Agriculture ■ Remote Controls ■ Consumer Electronics ■ Personal Health and Fitness ■ Toys Applications Support See www.cypress.com for development tools, reference designs, and application notes. Logic Block Diagram VREG VDD VCC PACTL L/D VBAT VIO IRQ SS SCK MISO MOSI PMU SPI CyFi Radio Modem Data Interface and Sequencer DSSS Baseband & Framer RSSI GFSK Modulator GFSK Demodulator RST Xtal Osc Synthesizer XTAL XOUT GND RFP RFN RFBIAS Cypress Semiconductor Corporation • 198 Champion Court Document #: 001-48013 Rev. • San Jose, CA 95134-1709 • 408-943-2600 Revised September 10, 2008 [+] Feedback 1 page www.DataSheet4U.com CYRF7936 Functional Block Overview 2.4 GHz CyFi Radio Modem The CyFi radio Modem is a dual conversion low IF architecture optimized for power, range, and robustness. The CyFi radio modem employs channel-matched filters to achieve high perfor- mance in the presence of interference. An integrated Power Amplifier (PA) provides up to +4 dBm transmit power, with an output power control range of 34 dB in seven steps. The supply current of the device is reduced as the RF output power is reduced. Table 2. Internal PA Output Power Step Table PA Setting Typical Output Power (dBm) 7 +4 60 5 –5 4 –13 3 –18 2 –24 1 –30 0 –35 Frequency Synthesizer Before transmission or reception may begin, the frequency synthesizer must settle. The settling time varies depending on channel; 25 fast channels are provided with a maximum settling time of 100 μs. The ‘fast channels’ (less than 100 μs settling time) are every third channel, starting at 0 up to and including 72 (for example, 0, 3, 6, 9 …. 69, 72). Baseband and Framer The baseband and framer blocks provide the DSSS encoding and decoding, SOP generation and reception, CRC16 generation and checking, and EOP detection and length field. Packet Buffers and Radio Configuration Registers Packet data and configuration registers are accessed through the SPI interface. All configuration registers are directly addressed through the address field in the SPI packet. Configu- ration registers allow configuration of DSSS PN codes, data rate, operating mode, interrupt masks, interrupt status, and so on. SPI Interface The CYRF7936 IC has an SPI interface supporting communication between an application MCU and one or more slave devices (including the CYRF7936). The SPI interface supports single-byte and multi-byte serial transfers using either 4-pin or 3-pin interfacing. The SPI communications interface consists of Slave Select (SS#), Serial Clock (SCK), Master Out-Slave In (MOSI), Master In-Slave Out (MISO), or Serial Data (SDAT). SPI communication may be described as the following: ■ Command Direction (bit 7) = ‘1’ enables SPI write transaction. When it equals a ‘0’, it enables SPI read transactions. ■ Command Increment (bit 6) = ‘1’ enables SPI auto address increment. When set, the address field automatically increments at the end of each data byte in a burst access. Otherwise the same address is accessed. ■ Six bits of address ■ Eight bits of data The device receives SCK from an application MCU on the SCK pin. Data from the application MCU is shifted in on the MOSI pin. Data to the application MCU is shifted out on the MISO pin. The active LOW Slave Select (SS#) pin must be asserted to initiate an SPI transfer. The application MCU can initiate SPI data transfers using a multi-byte transaction. The first byte is the Command/Address byte, and the following bytes are the data bytes shown in Figure 4 through Figure 7 on page 6. The SPI communications interface has a burst mechanism, where the first byte can be followed by as many data bytes as required. A burst transaction is terminated by deasserting the slave select (SS# = 1). The SPI communications interface single read and burst read sequences are shown in Figure 5 and Figure 6 on page 6, respectively. The SPI communications interface single write and burst write sequences are shown in Figure 7 and Figure 8 on page 6, respectively. This interface may be optionally operated in a 3-pin mode with the MISO and MOSI functions combined in a single bidirectional data pin (SDAT). When using 3-pin mode, user firmware must ensure that the MOSI pin on the MCU is in a high impedance state except when MOSI is actively transmitting data. The device registers may be written to or read from one byte at a time, or several sequential register locations may be written or read in a single SPI transaction using incrementing burst mode. In addition to single byte configuration registers, the device includes register files. Register files are FIFOs written to and read from using nonincrementing burst SPI transactions. The IRQ pin function may be optionally multiplexed onto the MOSI pin. When this option is enabled, the IRQ function is not available while the SS# pin is LOW. When using this configu- ration, user firmware must ensure that the MOSI pin on the MCU is in a high impedance state whenever the SS# pin is HIGH. The SPI interface is not dependent on the internal 12 MHz clock. Registers may therefore be read from or written to when the device is in sleep mode, and the 12 MHz oscillator disabled. The SPI interface and the IRQ and RST pins have a separate voltage reference pin (VIO). This enables the device to interface directly to MCUs operating at voltages below the CYRF7936 IC supply voltage. Document #: 001-48013 Rev. Page 5 of 21 [+] Feedback 5 Page www.DataSheet4U.com CYRF7936 Table 4. Recommended BoM for Systems where VBAT is 2.4V - 3.6V (PMU disabled) Item Qty CY Part Number Reference Description Manufacturer Mfr Part Number 1 1 NA ANT1 2.5GHZ H-STUB WIGGLE ANTENNA FOR 32MIL PCB NA NA 2 1 730-10012 C1 CAP 15PF 50V CERAMIC NPO 0402 Panasonic ECJ-0EC1H150J 3 1 730-11955 C3 CAP 2.0 PF 50V CERAMIC NPO 0402 Kemet C0402C209C5GACTU 4 1 730-11398 C4 CAP 1.5PF 50V CERAMIC NPO 0402 PANASONIC ECJ-0EC1H1R5C SMD 5 1 730-13322 C5 CAP 0.47 uF 6.3V CERAMIC X5R 0402 Murata GRM155R60J474KE19D 6 6 730-13404 C6,C7,C8, CAP 0.047 uF 16V CERAMIC X5R 0402 AVX C9,C10, C11 0402YD473KAT2A 7 1 730-11953 C12 CAP 1500PF 50V CERAMIC X7R 0402 Kemet C0402C152K5RACTU 8 1 730-13040 C13 CAP CERAMIC 4.7UF 6.3V XR5 0805 Kemet C0805C475K9PACTU 9 1 730-12003 C14 CAP CER 2.2UF 10V 10% X7R 0805 Murata GRM21BR71A225KA01L Electronics North America 10 1 800-13333 D1 LED GREEN/RED BICOLOR 1210 SMD LITEON LTST-C155KGJRKT 11 1 420-13046 J1 CONN USB PLUG TYPE A PCB SMT ACON UAR72-4N5J10 12 1 800-13401 L1 INDUCTOR 22NH 2% FIXED 0603 SMD Panasonic - ECG ELJ-RE22NGF2 13 1 800-11651 L2 INDUCTOR 1.8NH +-.3NH FIXED 0402 Panasonic - ECG ELJ-RF1N8DF SMD 14 2 610-10037 R1, R2 RES 24 OHM 1/16W 5% 0603 SMD Panasonic - ECG ERJ-3GEYJ240V 15 1 610-10343 R4 RES ZERO OHM 1/16W 0402 SMD Panasonic - ECG ERJ-2GE0R00X 16 3 610-10016 R5, R6, R7 RES CHIP 1K OHM 1/16W 5% 0402 SMD Panasonic - ECG ERJ-2GEJ102X 17 2 610-13472 R9,R8 RES CHIP 620 OHM 1/16W 5% 0402 SMD Panasonic - ECG ERJ-2GEJ621X 18 2 610-10684 R10, R11 RES CHIP 100 OHM 1/16W 5% 0402 SMD Phycomp USA 9C1A04021000FLHF3 Inc 19 1 200-13471 S1 SWITCH LT 3.5MMX2.9MM 160GF SMD Panasonic - ECG EVQ-P7J01K 20 1 CYRF7936-40LFC U1 IC, 2.4 GHz CyFi Transceiver QFN-40 Cypress CYRF7936 Rev A5 Semiconductor 21 1 CY8C24794-24LF U2 XI PSoC Mixed Signal Array Cypress CY8C24794-24LFXI Semiconductor 22 1 800-13259 Y1 CRYSTAL 12.00MHZ HC49 SMD eCERA GF-1200008 23 1 LABEL1 Serial Number XXXXXX Document #: 001-48013 Rev. ** Page 11 of 21 [+] Feedback 11 Page

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