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| SRAM | 256+2K | 
| Data Flash | Configurable | 
| LDROM | 4K | 
| I/O | 26 | 
| Timer | 4*16-bit | 
| UART | 2+3 | 
| SPI | 1 | 
| I2C | 1 | 
| PWM | 12*16-bit | 
| ADC | 15 | 
| ISP/ICP/IAP | Yes | 
| Status | H2/2019 | 
| INT | 2 | 
| Special Function | 1T 8051 , 24 MHz internal RC , on-chip debugger | 
The NuMicro® MS51 industrial series microcontrollers is based on 1T 8051 core.


                                                    
                                                    
                                                    
                                                    
                                                    
                                                    
                                                    
                                                    
                                                    
                                                    
                                                    
                                                    
                                                    
                                                    
                                                    
                                                    
                                                    
                                                    
                                                    
                                                    
                                    
                                    
                                    
                                    
                                    
                                    