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High-performance Sub-1GHz RF Transceiver
Features
Frequency range: 113 – 960 MHz
Modulation/demodulation: OOK, 2 (G)FSK, 4 (G)FSK
Data rate:
0.1 - 1000 kbps
Sensitivity: 2 FSK, -122 dBm DR=2.4 kbps, 433.92 MHz
4 FSK, -88 dBm DR=1 Mbps, 433.92 MHz
OOK, -94 dBm DR= 300 kbps, 433.92 MHz
Adjacent channel rejection : 62 dBc, BW = 4.8 kHz,
Blocking:
76 dBc , ±1 MHz offset, BW = 4.8 kHz
Operating voltage range:
Tx current: 30 mA @ 13 dBm, 433.92 MHz, FSK
82 mA @ 20 dBm, 433.92 MHz, FSK
Rx current: 9.6 mA (DCDC) @433.92 MHz, FSK
No extra RF switching components required in single antenna mode
Multiple super-low power (SLP) Rx modes available
Sleep current
400 nA, Duty Cycle = OFF
800 nA, Duty Cycle = ON
Special features:
Quick and stable automatic frequency control (AFC)
3 varied clock data recovery systems (CDR)
Quick and accurate valid signal detection (PJD, RSSI)
Super-low power (SLP) and Duty Cycle receiving
Fast Tx or Rx frequency hopping
Carrier sense multiple access (CSMA)
Automatic ACK and re-sending
Antenna diversity
4-wire SPI interface
Supporting both direct and packet modes, with configurable
packet handler and 128-Byte FIFO
NRZ format, Manchester, whiten data coding, FEC
Description
The CMT2310A is an ultra-low power, high-performance, OOK / 2
(G)FSK / 4 (G)FSK based RF transceiver, applicable to various
applications within the 113 - 960 MHz frequency band. The
product is part of the CMOSTEK NextGenRF
which covers a complete product line consisting of transmitters,
receivers and transceivers. The high-density integration of
CMT2310A simplifies the required BOM in system design. With Tx
power reaching +20 dBm and sensitivity reaching -122 dBm, it can
achieve optimized performance of application RF links. Through
providing multiple data packet formats and code methods, this
product ensures the flexible supporting of various applications.
Besides, the CMT2310A provides functions such as 128-byte
Tx/Rx
FIFO,
multiple
Duty-Cycle mode, LBT(listen before talk), high-precision RSSI,
LBD, power on reset, low-frequency clock output, quick frequency
hopping, squelch, etc., which allows more flexible application
design and gains more product differentiation capability.
Copyright © By CMOSTEK
Channel space = 12.5 kHz
1.8 - 3.6 V
TM
product family
GPIO
and
interrupt
configurations,
CMT2310A
Application
Automatic meter reading
Home security and building automation
ISM-band data communication
Industrial monitoring and control
Remote control and security system
Remote key entry
Wireless sensor node
Tag reader and writer
Ordering Information
Product Model
Frequency
CMT2310A-EQR
113 - 960 MHz
Refer to Table 22 for more ordering information.
QF24 (4X4)
C
Minimum
Package
Order
Quantity
QFN 24
3,000 pcs
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Table of Contents
Related Manuals for CMOSTEK CMT2310A
Summary of Contents for CMOSTEK CMT2310A
- Page 1 NRZ format, Manchester, whiten data coding, FEC Description The CMT2310A is an ultra-low power, high-performance, OOK / 2 (G)FSK / 4 (G)FSK based RF transceiver, applicable to various applications within the 113 - 960 MHz frequency band. The product is part of the CMOSTEK NextGenRF...
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Page 2: Table Of Contents
CMT2310A Table of Content Electrical Specifications....................................4 Recommended Operating Conditions............................4 Absolute Maximum Ratings................................4 RF Power Consumption..................................5 Receiver......................................6 Transmitter.....................................8 RF Frequency Synthesizer................................9 Settling Time....................................9 Crystal Oscillator..................................10 Low-frequency Oscillator................................10 1.10 Low Battery Detection..................................11 1.11 Digital Interface.................................... 11 1.12... - Page 3 CMT2310A 5.3.1 Startup Timing..................................29 5.3.2 Operation State..................................29 GPIO and Interrupt..................................30 Data Packet and Packet Handler................................33 Direct Mode....................................33 Packet Mode....................................34 6.2.1 Rx processing..................................34 6.2.2 Tx processing................................... 35 Low Power Operating....................................36 Duty Cycle Operating Mode................................. 36 Super-low Power (SLP) Rx Mode..............................36 Rx Automatic Frequency Hopping (RX AUTO HOP)........................
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Page 4: Electrical Specifications
[2]. The CMT2310A is a high performance RF integrated circuit. The operation and assembly of this chip should only be performed on a workbench with good ESD protection. -
Page 5: Rf Power Consumption
CMT2310A 1.3 RF Power Consumption Table 3. RF Power Consumption Typ. Typ. Parameter Symbol Condition Unit (Disable DCDC) (Enable DCDC) In sleep mode with sleep timer disabled Sleep current SLEEP In sleep mode with sleep timer enabled Ready current Ready... -
Page 6: Receiver
CMT2310A 1.4 Receiver Table 4. Receiver Specifications Parameter Symbol Condition Min. Typ. Max. Unit kbps Data rate 2 (G)FSK kbps 4 (GFSK 1000 kbps Deviation (RX) (G)FSK, 4 (G)FSK DR = 2.4 kbps, F = 1.2 kHz, BW = 4.8 kHz... - Page 7 CMT2310A Parameter Symbol Condition Min. Typ. Max. Unit Receiver channel Receiver channel bandwidth 1168 bandwidth RSSI range RSSI By a step of 1 dB -127 Co-channel DR = 2.4 kbps; FDEV = 1.2 kHz; rejection BW = 4.8 kHz @ 433 MHz，...
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Page 8: Transmitter
CMT2310A 1.5 Transmitter Table 5. Transmitter Specifications Parameter Symbol Condition Min. Typ. Max. Unit Specific peripheral components are Output power required according to different frequency bands. Output power step STEP GFSK Gaussian filter coefficient Output power change in Temperature range: -40 to +85 C... -
Page 9: Rf Frequency Synthesizer
CMT2310A 1.6 RF Frequency Synthesizer Table 6. RF Frequency Synthesizer Parameter Symbol Condition Min. Typ. Max. Unit Frequency range Require different matching networks. 675 ~ 960 MHz 450 ~ 640 MHz 338 ~ 450 MHz Frequency deviation DEV_RNG 225 ~ 320 MHz... -
Page 10: Crystal Oscillator
XTAL Notes: [1]. The CMT2310A can utilize external reference clock to directly drive XIN pin through the coupling capacitor. The peak-to-peak value of external clock signal is required between 0.3 and 0.7 V. [2]. It involves: (1) initial tolerance, (2) crystal loading, (3) aging, and (4) temperature changing. The acceptable crystal frequency tolerance is subject to the bandwidth of the receiver and the RF tolerance between the receiver and its paired transmitter. -
Page 11: Low Battery Detection
CMT2310A 1.10 Low Battery Detection Table 11. Low Battery Detection Specifications Parameter Symbol Condition Min. Typ. Max. Unit Detection accuracy 1.11 Digital Interface Table 12. Digital Interface Specifications Parameter Symbol Condition Min. Typ. Max. Unit Digital input high level Vdd-0.4... - Page 12 CMT2310A 1.12.2 Rx Sensitivity Vs. Data rate Test condition: Freq = 434 MHz, ppm = 10, BER <= 0.1% 1.12.3 Tx Power Vs. Supply Power Voltage Test condition: Freq = 434 MHz, 20 dBm matching network, Tx power with 3.3 V and 20 dBm www.cmostek.com...
- Page 13 CMT2310A 1.12.4 Tx Phase Noise www.cmostek.com Rev 1.0E | Page13/50...
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Page 14: Pin Descriptions
RF signal negative input Floating, not connected Tx output PA_VDD PA VDD IO VDD GPIO 4 Configurable, see Table 17 CMT2310A GPIO for more details. GPIO 5_RST Configurable, see Table 17 CMT2310A GPIO for more details. DVDD Digital VDD AVDD Analog VDD... -
Page 15: Typical Application Schematic
CMT2310A 3 Typical Application Schematic 3.1 Direct Tie Schematic Diagram Figure 2. Direct Tie Application Schematic Diagram (DCDC enabled) CMT2310A_QFN24_T Figure 3. Direct Tie Application Schematic Diagram (DCDC disabled) www.cmostek.com Rev 1.0E | Page15/50... - Page 16 CMT2310A Table 3-1. 20 dBm Direct Tie Application BOM Component Values 315 MHz 433 MHz 868 MHz 915 MHz Descriptions Unit Supplier +20 dBm +20 dBm +20 dBm +20 dBm ±5%, 0402 NP0, 50 V ±5%, 0402 NP0, 50 V ±5%, 0402 NP0, 50 V...
- Page 17 CMT2310A Table 3-2. 13 dBm Direct Tie Application BOM Component Values Descriptions Unit Supplier 315 MHz 433 MHz 868 MHz 915 MHz +13 dBm +13 dBm +13 dBm +13 dBm ±5%, 0402 NP 0, 50 V ±5%, 0402 NP 0, 50 V ±5%, 0402 NP 0, 50 V...
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Page 18: Function Description
CMT2310A 4 Function Description The CMT2310A is a high integrated mixed-signal transceiver, which employs a 32 MHz crystal to provide PLL reference frequency and digital clock with supporting of OOK, 2-(G)FSK, 4 (G)FSK modulation/demodulation as well as Direct and Packet Data processing modes. -
Page 19: Transmitter
4.3.1 Power-On Reset (POR) The power-on reset circuit detects the change of the VDD power supply and generate reset signal to reset the entire CMT2310A system. After the POR, the MCU must go through initialization process and re-configure the CMT2310A. There are two situations that will lead to the generation of POR. -
Page 20: Crystal Oscillator
Cpar is the parasitic capacitor connected at both ends of the crystal to ground with a value of about 2 ~6pF. A crystal oscillator of 15 pF is recommended to collaborate with CMT2310A. Besides, the less the ppm value of the crystal, the better the performance of the receiver. -
Page 21: Temperature Compensated Crystal Oscillator (Tcxo)
Applying TCXO will approximately cause a increase of the overall current by 1.5 ~2.0 mA. The more precise clock (< 2 ppm) enables the CMT2310A to attain higher sensitivity and better capability against out-of-band interference while operating in a narrower receiving bandwidth. -
Page 22: Received Signal Strength Indicator(Rssi)
Normally the frequency variance between the TX and RX is caused by the frequency variance of the crystal oscillators used in the both sides. The CMT2310A allows users to fill in the crystal tolerance value (in PPM) of TX and RX on RFPDK. Based on the crystal tolerance value, the RFPDK configures the AFC detecting range meanwhile trying to minimize the bandwidth used by the receiver. -
Page 23: Clock Data Recovery (Cdr)
The CMT2310A provides three types of CDR systems as follows. COUNTING system - The system is designed according to the case of relatively accurate symbol rate.If the symbol rate is 100% aligned, the unlimited length of 0 can be received continuously without error. - Page 24 CMT2310A Figure 9. SPI (4-wire) Read Register Timing Figure 10. SPI (4-wire) Write Register Timing Figure 11. SPI (3-wire) Read Register Timing Figure 12. SPI (3-wire) Write Register Timing www.cmostek.com Rev 1.0E | Page24/50...
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Page 25: Read/Write Register In Batch Mode (Burst)
As shown in the above figure, please notice the dot line in the middle, here strongly suggest that the MCU switches the IO to input mode before sending out the falling edge of the SCLK; as for CMT2310A, it should switch the IO to output mode after it has gotten the falling edge of the SCLK. -
Page 26: Fifo
5.2 FIFO The CMT2310A provides two separated 128-byte FIFO by default. They are used for RX and TX respectively. RX FIFO is used to store received data in Rx mode while TX FIFO is used to store data to be transmitted in Tx mode. Users can also set FIFO_MARGE_EN to 1 to merge the two separated FIFO into one 256-byte FIFO, which is used both in TX and RX mode. -
Page 27: Fifo Read Operation
CMT2310A 5.2.1 FIFO Read Operation To access FIFO, the MCU should first configure a few registers to set up the FIFO read/write mode, as well as some other operating modes. As shown in the figure below, it is the read and write timing in determined operating mode. FIFO operation is triggered by writing into address 0x7A in Page 0, it will trigger write operation when r/w bit is 0 and trigger read operation when r/w bit is 1. -
Page 28: Fifo Associated Interrupt
Figure 20. SPI (3-wire) Write FIFO Timing 5.2.2 FIFO Associated Interrupt CMT2310A provides comprehensive interrupt sources associated with the FIFO. The interrupt timing of Tx and Rx FIFO is shown in the figures below. Figure 21. CMT 2310A RX FIFO Interrupt Timing Figure 22. -
Page 29: Operation State, Timing And Power Consumption
IDLE state then wait for users to send power_up command. Figure 23. Power-on Timing 5.3.2 Operation State The CMT2310A supports 7 operation states: IDLE, SLEEP, STBY, RFS, RX, TFS and TX, as shown in the figure below. Table 15. CMT2310A State and Corresponding Active Module State... -
Page 30: Gpio And Interrupt
Figure 24. State Transition Diagram 5.4 GPIO and Interrupt The CMT2310A has 7 GPIO ports （GPIO 0～GPIO 5 and NIRQ） .Each GPIO can be configured as input or output independently. It also supports 3 interrupt ports, which can be configured to different GPIO outputs. - Page 31 CMT2310A The interrupt mapping is listed in the table below. As INT 1 and INT 2 have the same mapping, it takes INT 1 as an example in the table below. Table 18. CMT2310A Interrupt Mapping Table Name INT1_SEL Interrupt Descriptions...
- Page 32 CMT2310A Name INT1_SEL Interrupt Descriptions Clearing Method CSMA_DONE 100000 Interrupt for CSMA complete By MCU CCA_STATUS 100001 Signal channel sensing interrupt. By MCU By default, Interrupt is enabled when register value is 1. Users can set the INT_POLAR register bit to 1 to make all interrupts to be enabled when the register value is 0.
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Page 33: Data Packet And Packet Handler
CMT2310A 6 Data Packet and Packet Handler Data mode specifies how the MCU inputs transmission data and acquires received data. The CMT2310A supports both direct mode and packet mode. Direct Mode - In Rx mode, it only supports preamble and sync detection, namely FIFO does not work; demodulated data is ... -
Page 34: Packet Mode
Figure 27. Packet Mode Data Path The CMT2310A supports identical packet configuration for both Tx and Rx. It provides both the classic packet formats and more flexible packet formats, including variable packet format with Length located before Node ID, variable packet format with Length located after Node ID, and fixed packet format. -
Page 35: Tx Processing
Exit to the selected state automatically after finishing transmission of N packets without sending any command. Generally, the FIFO, packet handling mechanism and the related rich interrupt resources of the CMT2310A are compatible with most products of the same type in the market and can communicate with them seamlessly. Please see RPPDK configuration GUI for more details. -
Page 36: Low Power Operating
CMT2310A 7 Low Power Operating 7.1 Duty Cycle Operating Mode The CMT2310A allows Duty Cycle mode operating for both Tx and Rx by configuring related registers for power saving purpose. The Rx Duty Cycle includes 5 modes as follows. 1. Fully manual mode. - Page 37 CMT2310A Tx Data: Rx Time: Figure 29. Fundamental Low-power Receiver Scheme The traditional low-power transceiver solution and the 13 extended low-power solutions based on it are listed in the table below. Table 19. Low-power Rx mode Rx ExtendedMethods Rx ExtendedCondition No Rx extension is supported.Exit Rx state as soon as...
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Page 38: Rx Automatic Frequency Hopping (Rx Auto Hop)
CMT2310A The T1 and T2 mentioned in the table above refer to the RX T1 and the RX T2 time interval that can be set via the registers or RFPDK.The source of RSSI_VLD can be the comparison result of the RSSI or the detection result of the phase jump detector (PJD). -
Page 39: Tx Automatic Frequency Hopping (Tx Auto Hop)
CMT2310A Table 20. Rx-Auto-Hop Operating Mode Rx Extension Mode Rx Extension Condition If it is set to 0, there's no Rx extension. If PKT_DONE is detected before T1 is timeout and PKT_DONE_EXIT_EN = 1, it exits auto-hopping switches state specified None RX_EXIT_STATE. -
Page 40: Automatically Re-Sending (Tx Auto Resend)
CMT2310A The TX_Auto_Hop mode provides the register REQ_CHANL_LV to let users know the current channel value. Moreover, the register FREQ_DONE_TIMES is for users to read the number of currently completed frequency hopping. When making the configurations ready, users can set TX_AUTO_HOP_EN to 1 to enable the function, then send the go_tx command to enter the TX_Auto_Hop mode. - Page 41 CMT2310A Figure 30. Operation Process of Carrier Sensing Multi-path Accessing www.cmostek.com Rev 1.0E | Page41/50...
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Page 42: Antenna Diversity
The CMT2310A applies the dual-antenna angle diversity technique, which allows electromagnetic waves to pass through two different paths at different angles to reach the receiver end. The CMT2310A receiver determines which path is chosen to receive data packets by using RSSI to compare the signal-to-noise ratios of the two paths. - Page 43 CMT2310A Figure 32. Transceiver Application Schematic Diagram Applying Antenna Diversity with Separated Matching Network ANT_LOCK_EN is the enabling bit of the diversity antenna lock interrupt. ANT_LOCK_FLAG is the antenna lock flag bit. ANT_LOCK_CLR is the antenna lock interrupt flag clear bit.Users can read the value on the register ANT_INSTR to know which antenna is automatically locked to the current antenna diversity when the antenna locked.
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Page 44: User Register
The addresses of the 3 banks are continuous. Operation method against the 3 banks have no essential difference, namely all operations are direct read/write operations following the SPI register read/write timing. However, for the 3 banks the functionalities and usage are different as shown in the table below. Table 21. CMT2310A Register Bank Partitioning Page Address... -
Page 45: Ordering Information
CMT2310A 9 Ordering Information Table 22. CMT2310A Ordering Information Operating Minimum Model Description Packaging Package Condition Order Quantity CMT2310A, ultra-low power 1.8 to 3.6V, CMT2310A-EQR QFN24 (4x4) Tape and Reel 3,000 pcs sub-1GHz RF transceiver -40 to 85 ℃ Notes: [1]. -
Page 46: Packaging Information
CMT2310A 10 Packaging Information The packaging information of the CMT2310A is shown in the figure below. Figure 33. 24-Pin QFN 4x4 Packaging Table 23. 24-Pin QFN 4x4 Packaging Scale Scale (mm) Symbol Min. Typ. Max. 0.65 0.75 0.85 0.00 0,02 0,05 0.15... -
Page 47: Top Marking
CMT2310A 11 Top Marking Figure 34. CMT2310A Top Marking Table 24. CMT2310ATop Marking Information Marking method Laser. Pin 1 mark Diameter of the circle = 0.3 mm. 0.5 mm, align right. Font size 2310A, refers to model CMT2310A. Line 1 marking ①②③④... -
Page 48: Revise History
CMT2310A 12 Revise History Table 25. Revise History Records Version No. Chapter Description Date Initial version 2021-12-21 1.0A Ready for review 2022-01-09 1. Update pin name NSEL to CSB. 2. Update parameter name SCL to SCLK. 3. Change the note information in Table 21 in section 8.1. - Page 49 CMT2310A crystal at 1.10. www.cmostek.com Rev 1.0E | Page49/50...
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Page 50: Contacts
CMT2310A 13Contacts CMOSTEK Microelectronics Co., Ltd. Shenzhen Branch Address: 30/F Building 8A, Vanke Cloud City, Phase III, Xili, Nanshan District, Shenzhen, Guangdong, China Tel: +86-755-83231427 Post Code: 518071 Sales: sales@cmostek.com Supports: support@cmostek.com Website: www.cmostek.com www.cmostek.com Rev 1.0E | Page50/50...
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