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Expanded 20-pin microcontroller family

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article image Cost-effective entry point.

MICROCHIP Technology , a leading provider of microcontroller and analogue semiconductors, has announced two new 20-pin PIC microcontrollers to strengthen its 8-bit portfolio.

The PIC16F631 provides a cost-effective entry point for migration from 8 and 14-pin devices, while the PIC16F677 brings affordable hardware I2C and SPI capability to the small Flash microcontroller market.

Full compatibility with Microchip's latest midrange architecture PIC microcontrollers also makes the pair a suitable choice for upward migration to add more functionality or cost reduction to existing 20-pin designs.

The new microcontrollers are an extension of the PIC16F685/687/689/690 series, and can be used as "drop-in" replacements for their more feature-rich counterparts.

Board layout, control code, and tool suites can be completely re-used without modification, giving engineers the freedom to design platform-based systems without the associated cost penalty.

Both devices employ nanoWatt technology for minimum power consumption in battery-powered applications; dual analogue comparators with S/R latch mode to eliminate the need for discrete components; and In-Circuit Serial Programming technology for field programmability.

These enhancements serve to simplify the design of increasingly complex embedded-control systems.

The new PIC16F631/677 microcontrollers serve a broad market, including battery-powered devices (security systems, smoke and CO detectors, handheld devices); appliances (deep fryers, washers, dryers); and power conversion (power supplies, dc/dc converters, battery chargers).

Key features for both microcontrollers include:

* Up to 3.5kB of program Flash memory.

* Up to 128 bytes of RAM memory.

* Wide range of internally generated clock frequencies (31kHz - 8MHz).

* Two comparators with set-reset latch mode.

* 0.6V internal bandgap reference.

* Ultra-low-power wakeup.

* Enhanced low-current Watchdog Timer.

* Enhanced low-power Timer 1 with Gate Control.

* In-Circuit Serial Programming technology.

* Brownout reset with software-control option.

* Up to 18 I/O Pins.

* 4x4 QFN package options for space savings.

PIC16F677 Only:

* 12-channel, 10-bit ADC.

* SPI and I2C support with Address Mask option.

Development tool support

The two devices are supported by the full suite of Microchip's development tools, including the PICkit 2 Starter Kit, free MPLAB IDE (Integrated Development Environment), and the low-cost MPLAB ICD 2 (In-Circuit Debugger).

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