GENERAL DESCRIPTION
1 GENERAL DESCRIPTION
1.1 INTRODUCTION The ST92R195B MCU supports low power consumption and low voltage operation for power-efficient and low-cost embedded systems. 1.1.1 ST9+ Core The advanced Core consists of the Central Processing Unit (CPU), the Register File and the Interrupt controller. The general-purpose registers can be used as accumulators, index registers, or address pointers. Adjacent register pairs make up 16-bit registers for addressing or 16-bit processing. Although the ST9 has an 8-bit ALU, the chip handles 16-bit operations, including arithmetic, loads/stores, and memory/register and memory/memory exchanges. Two basic addressable spaces are available: the Memory space and the Register File, which includes the control and status registers of the onchip peripherals. 1.1.2 Power Saving Modes To optimize performance versus power consumption, a range of operating modes can be dynamically selected. Run Mode. This is the full speed execution mode with CPU and peripherals running at the maximum clock speed delivered by the Phase Locked Loop (PLL) of the Clock Control Unit (CCU).
STMicroelectronics
