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AT85C5121 - 8-bit Microcontroller

Download the AT85C5121 datasheet PDF. This datasheet also covers the T83C variant, as both devices belong to the same 8-bit microcontroller family and are provided as variant models within a single manufacturer datasheet.

General Description

T8xC5121 is a high performance CMOS ROM/CRAM derivative of the 80C51 CMOS single chip 8-bit microcontrollers.

Key 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 b.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (T83C-5121.pdf) that lists specifications for multiple related part numbers.

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Other Datasheets by Atmel (now Microchip Technology)

Part Number Description
AT85C5122 Smart Card Reader ICs
AT85C51SND3 Single Chip Digital Audio Decoder - Encoder
AT85C51SND3B Single-Chip Digital Audio Decoder - Encoder
AT85EC5122 Smart Card Reader ICs
AT85EC5122 (AT8xx512x) Smart Card Reader ICs

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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 Card Interface – Certified with Dedicated Firmware According to ISO 7816, EMV2000, GIE-CB, GSM 11.