1. Description

Embedded with 8-bit RISC core, the CMT2189B is an OOK based transmitting wireless MCU with low power and low cost, applying to 240 - 960 MHz band wireless applications.

Empowered by a 2 k x 14 b rewritable program space, a high-efficiency and ultra-low power transmitter, along with the supports of up to 8 general-purpose IOs, online debug, and ultra-low power sleep mode, the chip is ideal for a variety of consumer remote control applications.

2. Features

MCU Features

• PIC16 compatible instruction set

• Up to 16 MHz clock operating frequency

• 2T or 4T instruction cycle

• 8-layer hardware stack x 11 bit

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

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

• 128 x 8 b SRAM

• Support of online debug

• Support of ICSP programming

• Support of data EEPROM programming in application

• 8 general 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

• Multiple wakeup sources: INT, port change interrupt, WDT, data EEPROM write operation completion, etc.

• Built-in high speed 16 MHz RC oscillator

• Built-in low speed 32 kHz RC oscillator

• Port change interrupt: RA0 - RA7

• Program space protection

RF Features

• Frequency range: 240 - 960 MHz
  

• Modulation mode: OOK

• Data rate: 1.0 - 40.0 kbps

• Output power: + 13 dBm

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

System Features

• Supply voltage：2.0 ~ 3.6 V
  

• Operating temperature: -4 0 ~ + 85 ℃

• SOP14 packaging

3. Applications

• Wireless weather forecasting system

• Wireless lighting control system

• Consumer remote control