Description
The T8xC5101/02 family is a high performance CMOS ROM, OTP, EPROM derivative of the 80C51 CMOS single chip 8-bit microcontroller.

Features
• 80C51 Code Compatible
    – 8051 Instruction Compatible
    – 16 I/O + 2 Outputs in 24 Pin Packages
       16 I/O + 6 Outputs in 28 Pin Packages
    – Three 16-bit Timer/Counters
    – 256 Bytes Scratchpad RAM
• Program Memory
    – 8 KB ROM T83C5102
    – 16 KB ROM T83C5101
    – 16 KB EPROM/OTP T87C5101
• High-speed Architecture
• 40 MHz from 2.7 to 5.5V, Commercial or Industrial Temperature Range:
    – 40 MHz with a 40 MHz Crystal In Std. Mode
    – 40 MHz with a 20 MHz Crystal In X2 Mode
• 66 MHz from 4.5 to 5.5V, Commercial Temperature Range
    – 40 MHz with a 40 MHz Crystal in Std. Mode
    – 66 MHz with a 33 MHz Crystal in X2 Mode
• Dual Data Pointer
• On-chip eXpanded RAM (XRAM) (256 bytes)
• Programmable Clock Out and Up/Down Timer/Counter 2
• Asynchronous Port Reset
• Interrupt Structure with
    – 6 Interrupt Sources,
    – 4-Level Priority Interrupt System
• Full-duplex Enhanced UART
    – Framing Error Detection
    – Automatic Address Recognition
• Low EMI (no ALE)
• Power Control Modes
    – Idle Mode
    – Power-down Mode
• Packages: SO24, DIL24, SSOP24, SO28