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ST10F273

16-bit MCU with 512 Kbyte Flash memory and 36 Kbyte RAM

STMicroelectronics 

Introduction

ST10F273

CLKOUT function can output either the CPU clock (like in ST10F269) or a software

programmable prescaled value of the CPU clock.

On-chip RAM memory and FLASH size have been increased.

PLL multiplication factors have been adapted to new frequency range.

A/D Converter is not fully compatible versus ST10F269 (timing and programming model).

Formula for the conversion time is still valid, while the sampling phase programming model

is different.

Besides, additional 8 channels are available on P1L pins as alternate function: The

accuracy reachable with these extra channels is reduced with respect to the standard Port5

channels.

External Memory bus is affected by limitations on maximum speed and maximum

capacitance load: ST10F273 is not able to address an external memory at 64 MHz with 0

wait states.

XPERCON register bit mapping modified according to new peripherals implementation (not

fully compatible with ST10F269).

Bondout chip for emulation (ST10R201) cannot achieve more than 50MHz at room

temperature (so no real time emulation possible at maximum speed).

Input section characteristics are different. The threshold programmability is extended to all

port pins (additional XPICON register); it is possible to select standard TTL (with up to

400mV of hysteresis) and standard CMOS (with up to 750mV of hysteresis).

Output transition is not programmable.

CAN module is enhanced: ST10F273 implements two C-CAN modules, so the programming

model is slightly different. Besides, the possibility to map in parallel the two CAN modules is

added (on P4.5/P4.6).

On-chip main oscillator input frequency range has been reshaped, reducing it from 1 to 25

MHz down to 4 to 12 MHz. This is a low power oscillator amplifier, that allows a power

consumption reduction when Real Time Clock is running in Power down mode, using as

reference the on-chip main oscillator clock. When this on-chip amplifier is used as reference

for Real Time Clock module, the Power-down consumption is dominated by the

consumption of the oscillator amplifier itself.

A second on-chip oscillator amplifier circuit (32 kHz) is implemented for low power modes: it

can be used to provide the reference to the Real Time Clock counter (either in Power down

or Stand-by mode). Pin XTAL3 and XTAL4 replace a couple of VDD/VSS pins of ST10F269.

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