80C51 3Header


TK83C751 Microcontroller, 2K ROM, TWI

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Features

  • 8 Bit Microcomputer with 8051 Architecture
  • 2Kx8 Internal ROM, 64x8 RAM
  • Low standby current at full supply voltage
  • 0-20 MHz operation
  • Classic architecture instruction timing
  • 3 Bidirectional ports (19 bits)
  • 24 pin, 300 mil DIP or 28 pin PLCC package
  • Built in power management
  • Two Wire Interface (TWI) (I2CTM compatible)
  • 16 bit timer/counter with auto-reload.
  • Fixed rate timer
  • LED compatible outputs
  • Direct replacement for Philips 83C751 / 87C751 microprocessors.
  • Implemented with the Tekmos Customer Configured Microprocessor (CCM) technology
TK83C751

 

General Description

The TK83C751 is a derivative of the 8051 microprocessor architecture.  With 2Kx8 of mask programmed ROM, and 64x8 of scratchpad RAM, this part is a pin-for-pin replacement of the Philips 83C751 microprocessor.

The TK83C751 is intended to provide the 80C51 architecture in a small package and with a hardware Two Wire Interface (TWI).  The integrated TWI interface allows the TK83C751 to operate as either a master or a slave on the TWI bus.

To achieve this, port P2, and 5 bits of port P0 were removed, along with the external bus control pins.  This allows the TK83C751 to fit within either a 24 pin, 300 mil PDIP package, or a 28 pin PLCC package.

The 8051 architecture has been modified to provide a Two-Wire Interface (TWI).  Starting with the basic 80C51 design, the serial port and the two timers in the 80C51 were removed and replaced with the TWI interface and its associated timers.  The external interrupt pins and the timer gate and count pins were relocated from port P3 to port P1. The interrupt controller was simplified to provide only a single set of priorities.

The ability of the design to access external program and data memory was also removed, along with the PSEN, ALE, and EA pins.

The TK83C751 is built utilizing the Tekmos Customer Configured Microprocessor (CCM) technology.  Refer to the CCM data sheet for details on creating other microprocessors. 

Ordering

The TK83C751 is ROM programmed and may be ordered directly from Tekmos in quantities as low as 10,000 units.  Up to 4 different ROM codes may be combined to meet the 10,000 unit minimum order size.

A ROM programming fee applies to the first order.

The TK83C751 directly replaces the following NXP / Philips part numbers:

  P83C751-1N24
P83C751-2N24
P83C751-4N24
P83C751-5N24
P83C751-1A28
P83C751-2A28
P83C751-4A28
P83C751-5A28
S83C751-1N24
S83C751-2N24
S83C751-4N24
S83C751-5N24
S83C751-1A28
S83C751-2A28
S83C751-4A28
S83C751-5A28

The TK83C751 can also replace the following OTP (One Time Programmable) parts.  Please note that the TK83C751 is a masked ROM part, and has a ROM programming fee.  Also note the minimum 10K minimum order for ROMs.;

  P87C751-1N24
P87C751-2N24
P87C751-4N24
P87C751-5N24
P87C751-1A28
P87C751-2A28
P87C751-4A28
P87C751-5A28
S87C751-1N24
S87C751-2N24
S87C751-4N24
S87C751-5N24
S87C751-1A28
S87C751-2A28
S87C751-4A28

 

Documentation

The data sheet is available here:  pdf TK83C751 (86 KB)

  

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