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TK87C752 Microcontroller

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Features

  • 8 Bit Microcontroller with 8051 architecture
  • Small package sizes
    • 28 pin PDIP
    • 28-pin PLCC
  • Wide oscillator frequency range: 3.5MHz to 16MHz
  • 21 I/O Lines
  • Low power consumption:
    • Normal operation: less than 11mA @ 5V 12MHz
    • Idle mode
    • Power-down mode
  • 64k x 8 ROM
  • 256 x 8 RAM
  • 16-bit auto reloadable counter/timer
  • 5-channel 8-bit A/D converter
  • 8-bit PWM output/timer
  • 10-bit fixed-rate timer
  • Boolean processor
  • Can be used with CMOS and TTL
  • Ideal for logic replacement, consumer, and industrial applications
  • Direct replacement for NXP 87C752 microcontrollers

 

General Description

Based on the TK80C51, the TK87C752 is economically priced and comes in a small package size. Tekmos uses high-density CMOS technology to construct the TK87C752 Microcontroller, decreasing CMOS latch-up sensitivity through epitaxial substrate.

The TK87C752 contains a 64k x 8 Flash, a 256 x 8 RAM, 21 I/O lines, a 16-bit auto-reload counter/timer, a fixed-priority level interrupt structure, an on-chip oscillator, a five channel multiplexed 8-bit A/D converter, and an 8-bit PWM output. Additionally, the device comes with two power-reduction modes: idle and power down.

The TK87C752 is a derivative of the 8051 microcontroller architecture. With 64K x 8 of Flash, and 256 x 8 of scratchpad RAM, this part is a pin-for-pin replacement of the NXP 87C752 microcontroller.

The TK87C752 is intended to provide the 80C51 architecture in a small package and with both an 8-bit ADC and an 8-bit PWM capability.  To achieve this, port P2, and 3 bits of port P0 were removed, along with the external bus control pins.  This allows the TK87C752 to fit within either a 28 pin, 300 mil PDIP package, or a 28 pin PLCC package.

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

Because the TK87C752 utilizes a Flash ROM, it may be re-programmed if required. The original part was a One-Time-Programmable (OTP) part.

 

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