Everestek Inc. Everestek Wireless Module EW21TPV 5GHz 2.1CH Module Data Sheet Everestek Inc. Version: 0.1 Subject to change without further notice. 2021/09/01 www.everestek.
Everestek Inc. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. INDEX Features .................................................................................................................................................... 3 Application .............................................................................................................................................. 3 Electrical Specifications .......................................................................................................
Everestek Inc. 1. Features The EW21TPV is a module based on Everestek ETK52 to provide 3-channel audio for 2.1 channel (L+R+subwoofer) application. The modules can operate in either 5.8GHz or 5.2GHz Radio Frequency: 5.8G and 5.2G unlicensed bands Short Audio Latency: 19 ms (I2S to I2S @ 48K Fs) Delay Time Variation + audio jitter is only +/- 6.5μ sec. (Total delay time variation is less than +/-2.5 degree @ 1K sine tone.
Everestek Inc. 3. Electrical Specifications RF Specification Item Min Typ Max Unit Note RF Carrier Frequency 5725 ─ 5850 MHz For 5.8GHz 5135 ─ 5260 MHz For 5.2GHz ─ 2 ─ MHz -20dB bandwidth Output Power RF Sensitivity ─ 7 dBm -85 dBm Operation Condition Item Min Typ Max Unit VDD 2.7 3.3 3.6 V Operating Temperature -5 25 60 °C Note Power Supply Voltage Ambient temperature Electrical Specification (MCU+RF) Digital interface Item Min VIH Max Unit 0.7VDD VDD+0.
Everestek Inc. 4. Mechanical Specification Different labels and part numbers are used to distinguish Tx and Rx. Dimension：34 mm 18 , ± 2 mm Height (without connector)：2.5 ± 0.2 mm PCB 4 Layers Mechanical Drawing: Bottom view Antenna Area No trace, ground, power copper underneath this area! 9 13 2 (use plastic screw only) 18 34 25 16.5 1.27 25 1 1.27 5.5 4.7 26 2 9 (0, 0) www.everestek.
Everestek Inc. Connector Drawing: The no copper area is showed below in pink color. The main board layout should no copper, no trace underneath this area. If application is 2T mode (2T3R, 2T5R), the module placement as followed, 5 cm 2.3cm No copper above this line 1cm No copper under this trapzoid area www.everestek.
Everestek Inc. 5. Block Diagram and Typical Application Balun Connector RF Audio Transceiver Processor Balun EW21TPV typical application is a 1Tx-2Rx or 1Tx-3R em. E ernal DSP feed in ereo + b oofer da a through two I2S-data signal. Rx can output stereo/left channel/right channel/subwoofer audio by setting GPIO2.6 and 3.0. If system is 1Tx-2Rx, Rx#1 will output stereo audio, Rx#2 will output subwoofer.
Everestek Inc. The 1Tx-3Rx system architecture is shown below, Rx1: Left channel audio Rx2: Right channel audio Rx3: Subwoofer audio VCC VCC P2.6 P3.0 P02 I2S master/slave P2.6 DSP P0.3 P1.6 CCH_OK P2.6 P3.0 VCC I2S I2C I2S Rx1 I2C Left P3.1 wakeup channel output P3.2 Get_CCH ID pairing P02 wakeup P3.1 Get_CCH P3.2 Tx CCH_OK P1.6 P0.3 VCC P0.3 VCC P20 VCC P0.3 P2.6 P3.0 ID pairing I2S I2C Rx3 subwooferP3.1 wakeup output P3.2 Get_CCH P1.
Everestek Inc. 2.1 Channel I2S pins connections P3 P3 LRCK P22 P22 LRCK BCK P24 P24 BCK I2S Data in for stereo P25 I2S Data in for subwoofer P26 I2S Data out P12 EW21S Tx EW21S Rx Note: Subwoofer I2S output, L-channel data will be the original data from Tx, R-channel will be the inverse data of L-channel. www.everestek.
Everestek Inc. 6. I2S Format ETK51 I2S data in and data out share the same LRCK and BCK pins. ETK51 can work in master mode and slave mode. The audio sampling rate can be 32/44.1/48K. In master mode, ETK51 will generate I2S_MCLK/LRCK/BCK for external audio codec. In slave mode, ETK51 will receive external LRCK/BCK signal. ETK51 has a digital controlled PLL, so the clock jitter noise will not be a problem in Rx.
Everestek Inc. Note: DIN setup time and hold time timing in master mode is same as slave mode. LRCK tBKLR 50% duty BCK tBKDO DOUT I2S slave mode (Tx site) switching characteristics Symbol Min BCK Typ Max 64fs Symbol Min Typ Unit Hz Max Unit Note tBKLR 10 ns BCK rising to LRCK edge tLRBK 10 ns LRCK edge to BCK rising tDSU 20 ns DIN setup time tDHO 20 ns DIN hold time LRCK tBKLR tLRBK BCK tDSU tDHO DIN Second I2S da a inp www.everestek.biz plea e refer o man al 2.
Everestek Inc. 7. I2C Timing Parameter Symbol Min Max unit SCL clock frequency FSCL 200 KHz Hold time (repeated) START condition. After this period, the first clock pulse is generated tHD;STA 4 us LOW period of the SCL clock tLOW 2.2 us HIGH period of the SCL clock tHIGH 2.
Everestek Inc. 8. Module Pin Definition Pin 1 VDD 2 DGND 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Name I/O Function Definition VDD (2.7V~3.6V) System ground For audio codec system clock CODEC_12M O 12.288MHz for Fs 48K and 32K, 11.2896MHz for 44.1K P2.0 I/O GPIO DA USB DP2.6_PWM I/O GPIO or PWM D+ I/O USB D+ P0.2_TXD I/O GPIO UART TXD GPIO and SPI chip select for programming internal flash P0.7_CS I/O, C mode, or Arm Debug port P0.3_RXD I/O GPIO or UART RXD, ARM debug port P1.
Everestek Inc. 9. Audio Specifications Audio (Stereo) Specifications (I2S to I2S) @ Sampling Rate 48K Hz Item Min Typ Max Unit Note SNR 142 dB @1kHz THD + N -103 dB @1kHz 23 KHz -140 dB Frequency response Dynamic range @1kHz Audio (Stereo) Specifications (I2S to I2S) @ Sampling Rate 44.
Everestek Inc. Frequency response Dynamic range 1.8 KHz -13 dB @1kHz Audio (Subwoofer) Specifications (I2S to I2S) @ Sampling Rate 32K Hz Item Min Typ Max Unit Note SNR 140 dB @1kHz THD + N - dB @1kHz Frequency response 1.3 KHz -13 dB @1kHz Unit Note Dynamic range 10. Audio Latency Audio Latency (I2S to I2S) Item Min Typ Max Stereo 19.31 ms Subwoofer 20.31 ms 11.
Everestek Inc. 12. Ordering Information Module Model No.: EW21TPV-TX 13. EW21TPV-RX Revision History Date 2021/08/31 www.everestek.biz Revision 0.
# Quantity RefDes Value Name ____________________________________________________________________ _________________ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 1 C53 C_0201 C19 1 C_0201 C25 1 C_0201 C34 1 C_0201 C20, C54 2 C_0201 C16 1 C_0201 2 C51, C52 C_0201 7 C6, C11, C13, C24, C37, C38, C42 C_0201 2 C44, C45 C_0402 1 C3 C_0402 L12, L17 2 L_0201 L6, L8 2 L_0201 L9 1 L_0201 R2, R3 2 R_0402 L5 1 L_0201 J1 1 26PIN_Connect U7 1 XTAL 1 U8 ETK52N ---NC--C36 NC 1 C_0201 ANT1, ANT2 NC 2 Rabbit ANT-4 TP1 NC 1
P1.1_DIN ANT2 ANT1 C52 18pF C16 9pF C36 NC L12 1.0nH DGND 0.3pF C53 DGND P1.2_LRCK P1.7_NSS P1.3_BCK P1.4_SCK P1.0_DOUT DGND P3.1_ADCIN P3.0_ADCIN P0.0_SCL P0.1_SDA P0.4_MOSI P3.2_ADCIN PROG P0.5_MISO P1.5_MOSI P0.3_RXD P0.7_CS P0.6_SCK P0.2_TXD D+ P1.6_MISO P2.6_PWM L17 1.0nH DGND C25 0.8pF C20 1.2pF L6 1.2nH C19 0.5pF L9 3.3nH L8 1.2nH L5 51R DGND DGND C44 12pF XTAL_N U7 C51 18pF XTAL_N XTAL_P vbgDAC CLK12M vbgDAC DGND C3 4.
Federal Communication Commission Interference Statement This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
（1）this device may not cause harmful interference, and （2）this device must accept any interference received, including interference that may cause undesired operation. L’émetteur/récepteur exempt de licence contenu dans le présent appareil est conforme aux CNR d’Innovation, Sciences et Développement économique Canada applicables aux appareils radio exempts de licence.
This device is intended only for OEM integrators under the following condition: ● The transmitter module may not be co‐located with any other transmitter or antenna. As long as the condition above is met, further transmitter test will not be required. However, the OEM integrator is still responsible for testing their end‐product for any additional compliance requirements required with this module installed.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, (2) this device must accept any interference received, including interference that may cause undesired operation. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
