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On which pin resets the 8051 microcontroller? - Quora
My TechnoCare AT89S52 IC ATMEL 8051 Microcontroller Chip + 40 Pin DIP Mount IC Socket | 8 Bit Microprocessor 8Kb ISP(in System Programming) Flash Memory Up to 33MHz Clock Frequency Speed :
Real Time Clock with Alarm Option using AT89S52 and DS1307 IC
ISP Programming Kit for AT89S52 and AVR series Microcontroller under Repository-circuits -24876- : Next.gr
At89s52
AT89S52 Tutorial
GSM Module Interfacing with 8051 Microcontroller (AT89S52): Circuit Diagram & C Code