CST30XXA series (CST3006A/CST11A/CST3020A/CST3040A/CST3080A) series are 4-bits micro-controller which could play 1 channel ADPCM with PWM direct drive circuit. PWM resolution is 8/10/12 bits. They include a low cost, high performance CMOS micro-processor. The clock frequency of this up is typically 4.096 (±3%) MHz. This chip operates over a wide voltage range of 1.5V~5.5V. It contains program ROM (PROM) and data ROM (DROM) inside. The program ROM is 4K words and data ROM size is 248K bytes. The maximum working SRAM is (96+2) nibbles. It is provided with total 4 software programmable I/O Ports and a 13 levels low voltage detector (LVD).

CST30XXA series (CST3006A/CST3011A/CST3020A/CST3040A/CST3080A) Features:

* Operating voltage: 1.5V to 5.5V 

* MCU Operation frequency: 4.096 MHz 

* Memory Size 

  - Program ROM size: 4K words OTP type 

  - Data ROM size: 248K bytes OTP type 

  - SRAM size: 96*4 bits 

  - User register: 2*4 bits 

* Wakeup function for power-down mode: 

  - HALT mode wakeup source: Port A can wake up from HALT mode to NORMAL mode and executing wakeup sub-routine program. 

* 2 input/output pins: Port A0 and A1 can be defined as input or output port bit by bit.

* Three reset condition: 

  - Low voltage reset. (LVR=1.5V) 

  - Power on reset. 

  - Watch dog timer overflow. 

* One internal interrupt sources: 

  - PWM interrupt. 

* WDT 

  - Watch dog timer, can enabled/disabled by option. 

  - WDT period is 0.128 second. 

* Audio output: 

  - Support 8/10/12-bit PWM mode.

* Support option set for pull down resistor 1M, 50K Ohm, low voltage reset…etc. 

* Oscillator fuse option ±3%, temperature & voltage compensation. 

* Support security option (1 bit) for read inhibition. 

* Support 13-levels LVD function.

CST30XXA series (CST3006A/CST3011A/CST3020A/CST3040A/CST3080A) provides SOP8: