 Package size (QFN5X5, 40 pins).
 High performance pipeline complicated 8051
 Operation clock: 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64 of crystal oscillator.
 32KB Flash memory with copy protection, 256Bytes internal data RAM, 2KBytes external data RAM
 UART, I2C, SPI serial communication
 3 16/8-bit counter/timers
 2 Channel PWM
 Watchdog timer
 Sleep timer
 In-Circuit Debugger
 In-System programming/ In-Application programming
 Key wake-up
 24 GPIO
 Support 2.4GHz IEEE 802.15.4 DSSS RF Modulation format.
 Low RX current consumption (23mA)
 Low TX current consumption (18mA @ 0dBm, 23mA @ 3.5 dBm output power).
 PM2 with sleep timer current (4.3 uA)
 PM3 with sleep timer current (1.3 uA)
 On chip regulator, support input voltage 2.0 ~ 3.6 V.
 Programmable TX power level from -20 dBm to 3.5 dBm.
 Ultra High sensitivity: -96dBm at 250Kbps on-air data rate
 Fast settling time (30 us) synthesizer for frequency hopping system.
 Support low cost crystal (16 MHz).
 Support RTC clock (32.768KHz / 31.25KHz)
 ONE register setting for new channel frequency.
 8-bits Digital RSSI for clear channel indication.
 Auto Calibrations.
 Auto IF function.
 Clear channel assessment (CCA).
 Auto-ACK and Auto-resend scheme.
 Auto RSSI measurement.
 Auto CSMA-CA.
 Auto FCS (CRC) and Filtering.
 IEEE 802.15.4 Frame Filtering.
 Separated 128 bytes FIFO for RX and TX.
 Fast settling time synthesizer for transceiver turn around.
 HW AES128 to support CCM* security.
 Support ED (Energy Detect) for CCA.
 Integrated RC Oscillator for WOR /TWOR function.
 Built-in Battery Detect, Thermal Sensor and Crystal load capacitors.

 Wireless sensor network
 RF4CE Remote control system
 2.4GHz ISM band DSSS system
 Smart remote controller
 Home and building automation

Datasheet
Application Note
Reference circuit design (Module)
Reference code
Evaluation kit (EK)
Development Board (DVP)
ICE tool
Flash/OTP programming tool
Production test tool
*Please contact the agents or sales for more details