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INTRODUCTION

The ST6255C, and ST6265C devices are low cost members of the ST62xx 8-bit HCMOS family of microcontrollers, which is targeted at low to medium complexity applications. All ST62xx devices are based on a building block approach: a common core is surrounded by a number of on-chip peripherals.

The ST62E65C is the erasable EPROM version of the ST62T65C OTP device, which may be used to emulate the ST62T55C and ST62T65C OTP devices, as well as the respective ST6255C and ST6265C ROM devices.

Features

■ 3.0 to 6.0V supply operating range

■ 8 MHz maximum clock frequency

■ -40 to +125°C operating temperature range

■ Run, Wait and Stop modes

■ 5 interrupt vectors

■ Look-up table capability in program memory

■ Data storage in program memory: user selectable size

■ Data RAM: 128 bytes

■ Data EEPROM: 128 bytes (not in ST6255C)

■ User programmable options

■ 21 I/O pins, fully programmable as:

– Input with pull-up resistor

– Input without pull-up resistor

– Input with interrupt generation

– Open-drain or push-pull output

– Analog Input

■ 8 I/O lines can sink up to 30 mA to drive LEDs or TRIACs directly

– 8-bit Timer/Counter with 7-bit programmable prescaler

■ 8-bit Auto-reload timer with 7-bit programmable prescaler (AR Timer)

■ Digital watchdog

■ Oscillator safe guard (not in ST6265B ROM devices)

■ Low voltage detector for safe reset (not in ST6265B ROM devices)

■ 8-bit A/D converter with 13 analog inputs

■ 8-bit synchronous peripheral interface (SPI)

■ On-chip clock oscillator can be driven by quartz crystal, ceramic resonator or RC network

■ User configurable power-on reset

■ One external non-maskable interrupt

■ ST626x-EMU2 Emulation and Development System (connects to an MS-DOS PC via a parallel port)