CST5011A General Descriptions：
CST5011A series are 4-bits micro-controller which could play 4 channel melody or 4 channel ADPCM with PWM direct drive circuit. PWM resolution is 8/10/12 bits. They includes a low cost, high performance CMOS micro-processor. The clock frequency of this up is typically 8.192 (±3%) MHz. This chip operates over a wide voltage range of 2.0V~5.5V. It contains program ROM (PROM) and data ROM (DROM) inside. The maximum program ROM is 4K words and maximum data ROM size is 33K byte. The maximum working SRAM is (64+2) nibbles. It is provided with total 4 software programmable I/O Ports.
CST5011A Features：
Operating voltage: 2.0V to 5.5V
MCU Operation frequency: 8.192MHz
Memory Size
-Program ROM size: 4K*12-bits OTP type
-Data ROM size: 33K*8-bits OTP type
-SRAM size: 64*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 = 2.0V)
-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 256*256*16/Fsys. (WDT period is 0.13 sec for system clock=8.192MHz)
Audio output:
-Support PWM or DAC mode by option.
-Support 8/10/12 bits.
Support option set for pull down resistor 1M, 50K or 220K Ohm, low voltage reset…etc.
Oscillator fuse option ±3%, temperature & voltage compensation.
Support security option (1 bit) for read inhibition.
Support 16-levels LVD function.
CST5011A provides SOP8 package：
CST5011A Block Diagram：
CST5011A Speaker wakeup structure：
CST5011A The Application Circuit：
CST5011A DAC Selected by option：
Notice:
1. Regarding recording or remote car applications, please reference application note on web site.
2. C1 : 47 uF ~ 100 uF(depends on applications), C2：0.1 uF
3. DAC Applications circuit not support PWM wakeup function.
4. DAC Applications, please reference application note on web site.
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