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ST10F273Z4 Datasheet(PDF) 12 Page - STMicroelectronics |
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ST10F273Z4 Datasheet(HTML) 12 Page - STMicroelectronics |
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12 / 188 page  Introduction ST10F273Z4 12/188 restrictions and functional differences due to the XBUS peculiarities are present between the classic PWM and the new XPWM. ● An I2C interface on the XBUS is added (see X-I2C or simply I2C interface). ● 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: ST10F273Z4 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: ST10F273Z4 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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