ATMEL 8-bit Flash Microcontroller with Full Speed USB Device AT89C5131A-L Manual
User Manual
This document introduces the features of the 80c52x2 core, including the maximum core frequency, dual data pointer, full-duplex enhanced UART, three 16-bit timers/counters, 256 bytes of scratchpad RAM, 16/32KB on-chip flash EEPROM, 3KB flash EEPROM, 1KB EEPROM data, 1024 bytes of on-chip expanded RAM, and integrated power monitor (POR/PFD).
