ST10F276Z5 is a 16-bit MCU with MAC unit, 832 Kbyte flash memory and 68 Kbyte RAM. ST10F276Z5 has the following features: Highly performance 16-bit CPU with DSP functions, 31.25 ns instruction cycle time at 64 MHz max CPU clock, Multiply/accumulate unit (MAC) 16 x 16-bit multiplication, 40-bit accumulator, Enhanced boolean bit manipulations, Single-cycle context switching support.