Introduction
The ST10F271B and ST10F271E devices are derivatives of the STMicroelectronics ST10 family of 16-bit single-chip CMOS microcontrollers.
These two derivatives slightly differ on the available RAM size and Analog Channel Input number. These points will be highlighted in the corresponding chapters.
For all information that is common to the 2 derivatives, the generic ST10F271 name will be used.

FEATUREs
■ 16-bit CPU with DSP functions
– 31.25ns instruction cycle time at 64MHz max CPU clock
– Multiply/accumulate unit (MAC) 16 x 16-bit multiplication, 40-bit accumulator
– Enhanced boolean bit manipulations
– Single-cycle context switching support
■ On-chip memories
– 256 Kbyte Flash memory (32-bit fetch)
– Single voltage Flash memories with erase/program controller and 100K erasing/programming cycles.
– Up to 16 Mbyte linear address space for code and data (5 Mbytes with CAN or I2C)
– 2 Kbyte internal RAM (IRAM)
– 10/18 Kbyte extension RAM (XRAM)
– Programmable external bus configuration & characteristics for different address ranges
– Five programmable chip-select signals
– Hold-acknowledge bus arbitration support
■ Interrupt
– 8-channel peripheral event controller for single cycle interrupt driven data transfer
– 16-priority-level interrupt system with 56 sources, sampling rate down to 15.6ns
■ Timers
– Two multi-functional general purpose timer units with 5 timers
■ Two 16-channel capture / compare units
■ 4-channel PWM unit + 4-channel XPWM
■ A/D converter
– 24-channel 10-bit
–3µs minimum conversion time
■ Serial channels
– Two synch. / asynch. serial channels
– Two high-speed synchronous channels
– One I2C standard interface
■ 2 CAN 2.0B interfaces operating on 1 or 2 CAN busses (64 or 2x32 message, C-CAN version)
■ Fail-safe protection
– Programmable watchdog timer
– Oscillator watchdog
■ On-chip bootstrap loader
■ Clock generation
– On-chip PLL with 4 to 8 MHz oscillator
– Direct or prescaled clock input
■ Real time clock and 32 kHz on-chip oscillator
■ Up to 111 general purpose I/O lines
– Individually programmable as input, output or special function
– Programmable threshold (hysteresis)
■ Idle, power down and stand-by modes
■ Single voltage supply: 5V ±10%