CST4080A General Descriptions:
CST4080A series are 4-bits micro-controller which could play 2 channel melody or 2 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. These chips operate 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/8K words and data ROM size is 248K/240K 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).
CST4080A Features:
Operating voltage: 1.5V to 5.5V
MCU Operation frequency: 4.096 MHz
Memory Size
* Program ROM size: 4K/8K words OTP type
* Data ROM size: 248K/240K 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 wake-up sub-routine program.
4 input/output pins: Port A 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.
CST4080A Package:
CST4080A Block Diagram:
CST4080A The Application Circuit:
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