ARM Interrupts In general, ARM Interrupts are signals from a computer device or a programme within a controller that prompts the main programme to halt and choose what to do next. When an interrupt occurs in ARM, the ISR (Interrupt Service Routine) is called. When an interrupt is received, a component of a programme takes …
ARM Operating Modes The ARM processor has seven different modes of operation. Each ARM operating mode has a specific purpose, and only one mode is active at any one moment. Table 1 shows the operating modes, which define the registers that may be used (also known as the register map) and the operating privilege level.Except …
ARM Registers Basically there are two types of registers – General purpose registers and Special purpose registers. General-purpose registers hold either data or an address. The letter r is prefixed to the register number to identify them. For example, the label r4 is assigned to register 4. Figure depicts the active registers that are available …
Current Program Status Register | CPSR in ARM7 The ARM architecture supports two program status registers. The current program status register (CPSR) and the stored program status register (SPSR) are the two registers (SPSR). The ARM core uses the CPSR to monitor and control internal operations. The CPSR is a dedicated 32-bit register and resides …
ARM Core Dataflow Model The article deals with the explanation of the ARM core dataflow model. It also covers the complete implementation of architecture of the ARM processor. As depicted in figure, an ARM core dataflow model may be thought of as functional units connected by data buses, with the arrows representing data flow, the …
CISC vs RISC CISC vs RISC Architecture “Complex Instruction Set Computing” is the abbreviation for CISC This is a design for a microprocessor. The CISC architecture comprises a significant number of computer instructions that range in complexity and specialization from simple to complicated and specialized. Though the architecture was meant to calculate complicated instructions as …
ARM Processor Introduction The ARM processor center is a critical part of numerous fruitful 32-bit embedded systems. It stands for an Advanced RISC Machine. Here RISC stands for a Reduced Instruction Set Computer which will be explained further. The Advanced RISC Machine (ARM) processor is a kind of Central Processing Unit found in music players, …
Introduction The following diagram displays the complete PIC16f877a architecture. It consists of the various blocks that are discussed below. CPU CPU is one of the important parts of the PIC16f877a architecture. The CPU consists Arithmetic logic unit (ALU), a memory unit (MU), a control unit (CU), Accumulator. ALU performs arithmetic and logical operations, MU stores …
Introduction to PIC 16f877a PIC stands for Peripheral Interface Controller. It can be programmed using flash memory technology, this lets stored data be electrically erased and reprogrammed, making this microcontroller very convenient and widely used in a huge number of devices like remote sensors, security and safety devices and home automation. This microcontroller is pretty …
