AT89C5121 - ATMEL Corporation

AT89C5121 8-bit Microcontroller

T8xC5121 is a high performance CMOS ROM/CRAM derivative of the 80C51 CMOS single chip 8-bit microcontrollers. T8xC5121 retains the features of the Atmel 80C51 with extended ROM capacity (16 Kbytes), 512 bytes of internal RAM, a 4-level interrupt system, two 16-bit timer/counters (T0/T1), a full duplex enhanced UART (EUART) with baud rate generator (BRG) and.

Features

• 80C51 Core
  – 12 or 6 Clocks per Instruction (X1 and X2 Modes)
  – 256 Bytes Scratchpad RAM
  – Dual Data Pointer
  – Two 16-bit Timer/Counters: T0 and T1 T83C5121 with 16 Kbytes Mask ROM T85C5121 with 16 Kbytes Code RAM T89C5121 with 16 Kbytes Code RAM and 16 Kbytes EEPROM On-chip Expanded RAM (XRAM): 256 Bytes Versatile Host Serial Interface
  – Full-duplex Enhanced UART (EUART) with Dedicated Baud Rate Generator (BRG): Most Standard Speeds up to 230K bits/s at 7.36 MHz
  – Output Enable Input
  – Multiple Logic Level Shifters Options (1.8V to V CC)
  – Automatic Level Shifter Option Multi-protocol Smart.