ST10F272M datasheet(11/175 Pages) STMICROELECTRONICS

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ST10F272M

Introduction

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Introduction

1.1

Description

The ST10F272M device is a new derivative of the STMicroelectronics ST10 family of 16-bit

single-chip CMOS microcontrollers.

The ST10F272M combines high CPU performance (up to 20 million instructions per second)

with high peripheral functionality and enhanced I/O capabilities. It also provides on-chip

high-speed single voltage Flash memory, on-chip high-speed RAM, and clock generation

via PLL.

The ST10F272M is processed in 0.18mm CMOS technology. The MCU core and the logic is

supplied with a 5V to 1.8V on-chip voltage regulator. The part is supplied with a single 5V

supply and I/Os work at 5V.

The ST10F272M is an optimized version of the ST10F272E, upward compatible with the

following set of differences:

●

Maximum CPU frequency is 40 MHz

●

Reduced range for the Standby Voltage: VStby must be in the range of 4.5 to 5.5V.

●

Identification registers: the IDMEM register reflects the Flash type difference and can

be used to differentiate the two devices by software

●

Improved EMC behavior thanks to the introduction of an internal RC filter on the 5V for

the ballast transistors

1.2

Special characteristics

1.2.1

1.2.1 XPeripheral clock gating

This new feature have been implemented on the ST10F272M: Once the EINIT instruction

has been executed, only the XPeripherals enabled in the XPERCON register will be clocked.

The new feature allows to reduce the power consumption and also should improve the

emissions as it avoids to propagate useless clock signals across the device.

1.2.2

1.2.2 Improved supply ring

An RC filter has been introduced in the 5V power supply ring of the ballast transistor. In

addition, the supply rings for the internal voltage regulators and the IOs have been split.

These two modifications should improve the behavior of the device regarding conducted

emissions.

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