I have a chip,but the type was errased,no Logo,no type, so I wanna find the type of chip,It's very important to me !
And I list information about pin's function
And so many people tell me it's not a Microcontroller,it's like CPLD or other's programable device,
Go to Farnell or Mouser or Digikey to use their search mechanisms. Search for all microcontrollers in SOP28 housing. Then find the ones with GND on pin 7 and Vdd on pin 21. Fortunately his way you will narrow your search to a specific producer and uC family...