80C51-based microcontroller with ADC

Electronics Technology

21 November 2001 Electronics Technology

The 87LPC767 is a highly integrated single-chip microcontroller designed for low system cost applications. As a member of Philips Semiconductors' 51LPC microcontroller family, the 87LPC767 offers an 8 bit ADC with four multiplexed channels and two analog comparators with dual multiplexed inputs and on-chip reference. In addition, the device provides 4K of OTP code memory and 128 bytes of data SRAM, making it suitable for high-level programming. The code memory is in-system programmable (ISP) through a serial interface. Other embedded features which reduce the need for external components, are brownout detection and an on-chip RC oscillator that is very stable over temperature and voltage.

The MCU core is fully compatible with the industry-standard C51 core, but features a 2X speed mode, where the CPU clock is divided by 6 instead of 12. At 20 MHz, the 51LPC family devices provide a throughput identical to that of a conventional C51 running at 40 MHz, thus minimising EMI and power consumption. At 32 kHz, the device consumes only 16 µA and the operating voltage ranges from 2,7-6,0 V (3,0-6,0 V for analog peripherals).

The device comes with extensive serial communication capabilities such as RS232, RS485 and I²C interface. This interfaced in combination with the analog capabilities of the chip make it ideal for a variety of applications which include sensors.

Mutronics (Value Added Distributor), (011) 608 1460.

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80C51-based microcontroller with ADC

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