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ST72324 QUICK REFERENCE NOTE

2 ST72324 KEY BENEFITS

2.1 8-BIT SOLUTION FOR MID-RANGE APPLICATIONS

The device offers the following state-of-the-art benefits:

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Reduced board size, as most components are integrated in the device. There is no need for

a separate RESET generator, low voltage detection circuitry (LVD) or auxiliary voltage

detection (AVD) for early warning of power failures.

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Availability in a range of pin-compatible devices from 8K to 32K of ROM or Flash program

memory. Hence, there is no need to re-design the board if the application code size

increases.

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Up to 32 I/O ports and a 10-bit A/D converter with up to 12 input channels reduce the

integration effort and board size.

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True open drain I/O pins for applications requiring high current, e.g. for driving relays

through I/Os.

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17 addressing modes are supported, resulting in more compact code.

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Flash with Read-out protection against piracy and also Register Access Security System

(RASS) to prevent accidental programming/erasing.

Useful Tips:

To store non-volatile parameters (such as user preferences and

calibration constants), you can emulate Data EEPROM with the

HDFlash Memory.

For more information, refer to:

AN1502: Emulated Data EEPROM with ST7 HDFlash memory

2.2 ENHANCED CLOCK MANAGEMENT MODULE

This module allows you to select different main clock sources:

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An external source

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4 crystal or ceramic resonator oscillator types

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An internal high frequency oscillator

Each oscillator is optimized for a given frequency in terms of consumption. This can be se-

lected through the option byte.

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Along with the above mentioned options for selection of clock source, the clock

management also supports a Main Clock Out option which can be used to drive external