you select 89S52 or 89C52 | Microcontroller › 8051 › Burning code into AT89c51 › you select 89S52 or 89C52 March 3, 2016 at 5:53 am #13752 Ashutosh BhattParticipant you select 89S52 or 89C52 chip rather than 89C51. it has double the memory of 8K