SWRS045F January   2006  – November 2018 CC1021

PRODUCTION DATA.  

  1. 1Device Overview
    1. 1.1 Features
    2. 1.2 Applications
    3. 1.3 Description
    4. 1.4 Functional Block Diagram
  2. 2Revision History
  3. 3Terminal Configuration and Functions
    1. 3.1 Pin Diagram
    2. 3.2 Pin Configuration
  4. 4Specifications
    1. 4.1  Absolute Maximum Ratings
    2. 4.2  ESD Ratings
    3. 4.3  Recommended Operating Conditions
    4. 4.4  RF Transmit
    5. 4.5  RF Receive
    6. 4.6  RSSI / Carrier Sense
    7. 4.7  Intermediate Frequency (IF)
    8. 4.8  Crystal Oscillator
    9. 4.9  Frequency Synthesizer
    10. 4.10 Digital Inputs / Outputs
    11. 4.11 Current Consumption
    12. 4.12 Thermal Resistance Characteristics for VQFNP Package
  5. 5Detailed Description
    1. 5.1  Overview
    2. 5.2  Functional Block Diagram
    3. 5.3  Configuration Overview
      1. 5.3.1 Configuration Software
    4. 5.4  Microcontroller Interface
      1. 5.4.1 Configuration Interface
      2. 5.4.2 Signal Interface
      3. 5.4.3 PLL Lock Signal
    5. 5.5  4-wire Serial Configuration Interface
    6. 5.6  Signal Interface
      1. 5.6.1 Synchronous NRZ Mode
      2. 5.6.2 Transparent Asynchronous UART Mode
      3. 5.6.3 Synchronous Manchester Encoded Mode
        1. 5.6.3.1 Manchester Encoding and Decoding
    7. 5.7  Data Rate Programming
    8. 5.8  Frequency Programming
      1. 5.8.1 Dithering
    9. 5.9  Receiver
      1. 5.9.1  IF Frequency
      2. 5.9.2  Receiver Channel Filter Bandwidth
      3. 5.9.3  Demodulator, Bit Synchronizer and Data Decision
      4. 5.9.4  Receiver Sensitivity versus Data Rate and Frequency Separation
      5. 5.9.5  RSSI
      6. 5.9.6  Image Rejection Calibration
      7. 5.9.7  Blocking and Selectivity
      8. 5.9.8  Linear IF Chain and AGC Settings
      9. 5.9.9  AGC Settling
      10. 5.9.10 Preamble Length and Sync Word
      11. 5.9.11 Carrier Sense
      12. 5.9.12 Automatic Power-Up Sequencing
      13. 5.9.13 Automatic Frequency Control
      14. 5.9.14 Digital FM
    10. 5.10 Transmitter
      1. 5.10.1 FSK Modulation Formats
      2. 5.10.2 Output Power Programming
      3. 5.10.3 TX Data Latency
      4. 5.10.4 Reducing Spurious Emission and Modulation Bandwidth
    11. 5.11 Input and Output Matching and Filtering
    12. 5.12 Frequency Synthesizer
      1. 5.12.1 VCO, Charge Pump, and PLL Loop Filter
      2. 5.12.2 VCO and PLL Self-Calibration
      3. 5.12.3 PLL Turn-on Time versus Loop Filter Bandwidth
      4. 5.12.4 PLL Lock Time versus Loop Filter Bandwidth
    13. 5.13 VCO and LNA Current Control
    14. 5.14 Power Management
    15. 5.15 On-Off Keying (OOK)
    16. 5.16 Crystal Oscillator
    17. 5.17 Built-in Test Pattern Generator
    18. 5.18 Interrupt on Pin DCLK
      1. 5.18.1 Interrupt Upon PLL Lock
      2. 5.18.2 Interrupt Upon Received Signal Carrier Sense
    19. 5.19 PA_EN and LNA_EN Digital Output Pins
      1. 5.19.1 Interfacing an External LNA or PA
      2. 5.19.2 General-Purpose Output Control Pins
      3. 5.19.3 PA_EN and LNA_EN Pin Drive
    20. 5.20 System Considerations and Guidelines
      1. 5.20.1 SRD Regulations
      2. 5.20.2 Narrowband Systems
      3. 5.20.3 Low Cost Systems
      4. 5.20.4 Battery Operated Systems
      5. 5.20.5 High Reliability Systems
      6. 5.20.6 Frequency Hopping Spread Spectrum Systems (FHSS)
    21. 5.21 Antenna Considerations
    22. 5.22 Configuration Registers
      1. 5.22.1 Memory
  6. 6Applications, Implementation, and Layout
    1. 6.1 Application Information
      1. 6.1.1 Typical Application
    2. 6.2 Design Requirements
      1. 6.2.1 Input / Output Matching
      2. 6.2.2 Bias Resistor
      3. 6.2.3 PLL Loop Filter
      4. 6.2.4 Crystal
      5. 6.2.5 Additional Filtering
      6. 6.2.6 Power Supply Decoupling and Filtering
    3. 6.3 PCB Layout Guidelines
  7. 7Device and Documentation Support
    1. 7.1 Device Support
      1. 7.1.1 Device Nomenclature
    2. 7.2 Documentation Support
      1. 7.2.1 Community Resources
    3. 7.3 Trademarks
    4. 7.4 Electrostatic Discharge Caution
    5. 7.5 Export Control Notice
    6. 7.6 Glossary
  8. 8Mechanical Packaging and Orderable Information
    1. 8.1 Packaging Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

5.5 4-wire Serial Configuration Interface

The CC1021 device is configured via a simple 4-wire SPI-compatible interface (PDI, PDO, PCLK and PSEL) where the CC1021 device is the slave. There are 8-bit configuration registers, each addressed by a 7-bit address. A Read/Write bit initiates a read or write operation. A full configuration of the CC1021 device requires sending 33 data frames of 16 bits each (7 address bits, R/W bit and 8 data bits). The time needed for a full configuration depends on the PCLK frequency. With a PCLK frequency of 10 MHz the full configuration is done in less than 53 ms. Setting the device in power down mode requires sending one frame only and will in this case take less than 2 ms. All registers are also readable.

During each write-cycle, 16 bits are sent on the PDI-line. The seven most significant bits of each data frame (A6:0) are the address-bits. A6 is the MSB (Most Significant Bit) of the address and is sent as the first bit. The next bit is the R/W bit (high for write, low for read). The 8 data-bits are then transferred (D7:0). During address and data transfer the PSEL (Program SELect) must be kept low. See Figure 5-4.

The timing for the programming is also shown in Figure 5-4 with reference to Table 5-1. The clocking of the data on PDI is done on the positive edge of PCLK. Data should be set up on the negative edge of PCLK by the microcontroller. When the last bit, D0, of the 8 data-bits has been loaded, the data word is loaded into the internal configuration register.

The configuration data will be retained during a programmed power down mode, but not when the power supply is turned off. The registers can be programmed in any order.

The configuration registers can also be read by the microcontroller via the same configuration interface. The seven address bits are sent first, then the R/W bit set low to initiate the data read-back. The CC1021 device then returns the data from the addressed register. PDO is used as the data output and must be configured as an input by the microcontroller. The PDO is set at the negative edge of PCLK and should be sampled at the positive edge. The read operation is illustrated in Figure 5-5.

PSEL must be set high between each read/write operation.

CC1021 config_reg_wrt_oper_swrs045.gifFigure 5-4 Configuration Registers Write Operation
CC1021 config_reg_read_oper_swrs045.gifFigure 5-5 Configuration Registers Read Operation

Table 5-1 Serial Interface, Timing Specification(1)

PARAMETER MIN MAX UNIT CONDITIONS
FPCLK PCLK, clock frequency 10 MHz
TCL,min PCLK low pulse duration 50 ns The minimum time PCLK must be low.
TCH,min PCLK high pulse duration 50 ns The minimum time PCLK must be high.
TSS PSEL setup time 25 ns The minimum time PSEL must be low before positive edge of PCLK.
THS PSEL hold time 25 ns The minimum time PSEL must be held low after the negative edge of PCLK.
TSH PSEL high time 50 ns The minimum time PSEL must be high.
TSD PDI setup time 25 ns The minimum time data on PDI must be ready before the positive edge of PCLK.
THD PDI hold time 25 ns The minimum time data must be held at PDI, after the positive edge of PCLK.
Trise Rise time 100 ns The maximum rise time for PCLK and PSEL
Tfall Fall time 100 ns The maximum fall time for PCLK and PSEL
(1) The setup and hold times refer to 50% of VDD. The rise and fall times refer to 10% / 90% of VDD. The maximum load that this table is valid for is 20 pF.
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