1. Descriptions

Embedded with 8-bit RISC core, the CMT2180B is an OOK based transmitting wireless MCU with low power and low cost, applying to 312 - 480 MHz band wireless applications.

Empowered by a 1 k x 14 b rewritable program space, a high-efficiency and ultra-low power transmitter, along with the supports of up to 5 general-purpose IOs, online debug, and ultra-low power sleep mode, the chip is ideal for a variety of consumer remote control applications. With an operating temperature range of - 40 ~ 85 ℃ and a power supply voltage of 2.0 ~ 3.6 V, it consumes only a current of 17.5 mA while delivering +13 dBm power at 433.92 MHz. The CMT2180B co-working with CMOSTEK's NextGenRFTM

series receivers offers an ideal solution for ultra-low power RF applications.

2. Features

MCU Features

• 1 k x 14 b rewritable program storage space (16 bytes/page)

• 256 x 8 b data EEPROM (16 bytes/page)

• 64 x 8 b SRAM

• 8-layer hardware stack x 10 bits

• Support of online debugging

• Support of in-system programming (ICSP)

• Support of data EEPROM programming in application

• 5 general purpose IOs

• One Timer 0 with 8-bit prescaler

• One Timer 2 with 8-bit prescaler

• WDT with 7-bit prescaler (the overflow frequency is about 16 - 2048 ms)

• Support of power up delay counter (PWRT)

• Support of low power mode SLEEP

• 4 wake-up sources: INT, port change interrupt, WDT and write operation completion

• Built-in high speed 16 MHz RC oscillator

• Built-in low speed 32 kHz RC oscillator

• Port change interrupt: PA0 - PA5

• Program space protection

• Clock operating frequency (Fsys) up to 16 MHz

• 2.0 – 3.6 V: Fsys being up to 8 MHz

• 2.7 – 3.6 V: Fsys being up to 16 MHz

RF Features

• Frequency range: 312 - 480 MHz

• Modulation mode: OOK

• Data rate: 0.5 - 40.0 kbps

• Output power: + 13 dBm

• Operating current: 17.5 mA @ +13 dBm, 433.92 MHz with continuous 1 transmitting

System Features

• Supply voltage：2.0 ~ 3.6 V

• Operating temperature: -4 0 ~ + 85 ℃

• SOP14 packaging

3. Application

• Wireless weather forecasting system

• Wireless lighting control system

• Consumer remote control