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                              4-bit CPU with 67 instructions | 
                            
                            
                            
                              
                              	 
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                              Operating voltage from 2.2V ~ 5.5V  | 
                            
                            
                            
                              
                              	 
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                              127 seconds voice capacity are provided (@6KHz sampling rate)  | 
                            
                            
                            
                              
                              	 
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                              256K x 12-bit ROM and 144 x 4-bit SRAM | 
                            
                            
                            
                              
                              	 
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                              1-Ch speech synthesizer | 
                            
                            
                            
                              
                              	 
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                              12 flexible I/O pads, 4 pads with large and constant current control | 
                            
                            
                            
                              
                              	 
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                              Support halt mode and standby mode | 
                            
                            
                            
                              
                              	 
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                              Provide low voltage reset, watchdog reset and external port reset | 
                            
                            
                            
                              
                              	 
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                              Configurable inferred carrier option
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                              Internal or external RC oscillator for system clock | 
                            
                            
                            
                              
                              	 
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                              10-bit PWM and 12-bit DAC audio output |