CST30XXA series (CST3006A CST3011A/CST3020A/CST3040A/CST3080A) is a four microcontroller, can be directly driven by PWM circuit ADPCM play 1 road. The PWM resolution is 8/10/12 bits. They include low-cost, high-performance CMOS microprocessors. The clock frequency for this uplink is usually 4.096 (±3%) MHz. The chip operates in a wide voltage range from 1.5V to 5.5V. It contains program ROM (PROM) and data ROM (DROM). The program ROM is 4K words, and the data ROM size is 248K bytes. The maximum working SRAM is (96+2) half bytes. It offers a total of four software-programmable I/O ports and a 13-stage low voltage detector (LVD).

* Operating voltage: 1.5V to 5.5V
* MCU operating frequency: 4.096 MHz
* Memory size
- Program ROM size: 4K word OTP type
- ROM size: 248 KB OTP type
- SRAM size: 96 x 4 bits
- User register: 2 x 4 bits
* Power off mode wake-up function:
- HALT mode Wake up source: Port A can wake up from HALT mode to NORMAL mode and execute the wake up subroutine.
* 2 input/output pins: Ports A0 and A1 can be defined bit by bit as input or output ports.
* Triple reset condition:
- Low voltage reset. (LVR=1.5V)
- Power-on and reset.
- Watchdog timer overflowed.
* An internal interrupt source:
- PWM is interrupted.
* WDT
- Watchdog timer, which can be enabled/disabled by option.
- The WDT period is 0.128 seconds.
* Audio Output:
- Supports 8/10/12-bit PWM mode.
* Support pull-down resistor 1M, 50K ohm, low voltage reset and other options.
* Oscillator fuse option ±3%, temperature and voltage compensation.
* Support read disable security option (1 bit).
* Support level 13 LVD function.