What is AHB bus protocol?
Advanced High-performance Bus (AHB) AHB is a bus protocol introduced in Advanced Microcontroller Bus Architecture version 2 published by ARM Ltd company. In addition to previous release, it has the following features: large bus-widths (64/128/256/512/1024 bit).
What is the purpose of AHB?
AHB:- It is used for High-Frequency Design and it supports multiple Bus Master, Burst transfer, and pipelined operations. Common AHB Slaves are internal memory devices, external memory interface,s and high bandwidth peripherals.
What is AHB Lite bus?
About the protocol AMBA AHB-Lite addresses the requirements of high-performance synthesizable designs. It is a bus interface that supports a single bus master and provides high-bandwidth operation.
What is AHB bus matrix?
The bus matrix module, BusMatrix , enables multiple AHB masters from different AHB buses to be connected to multiple AHB slaves on multiple AHB slave buses. It enables parallel access to a number of shared AHB slaves from a number of different AHB masters.
Is the AHB bus synchronous?
The bi-directional AHB/AHB Bridge is used to interconnect high-speed and low-speed AMBA AHB buses. The bridge supports synchronous clocks with any frequency ratio between the two interconnected buses.
What is bus matrix in microcontroller?
The Cortex-M3 and Cortex-M4 microcontrollers are designed with a number of parallel internal busses this is called the “AHB bus matrix lite.” The bus matrix allows a Cortex-M-based microcontroller to be designed with multiple bus masters (ie, a unit capable of initiating a bus access) which can operate in parallel.
What is bus matrix in arm?
The bus matrix module, BusMatrix, enables multiple AHB masters from different AHB buses to be connected to multiple AHB slaves on multiple AHB slave buses. It enables parallel access to a number of shared AHB slaves from a number of different AHB masters.
What is wrap burst?
A wrapping burst is similar to an incrementing burst, in that the address for each transfer in the burst is an increment of the previous transfer address. However, in a wrapping burst the address wraps around to a lower address when a wrap boundary is reached.
Where is APB used?
APB : The Advanced Peripheral Bus (APB) is used for connecting low bandwidth peripherals. It is a simple non-pipelined protocol that can be used to communicate(read or write) from a bridge/master to a number of slaves through the shared bus.
What is dummy master in AHB?
The dummy bus master is a master which only performs IDLE transfers. It is only required in systems with slaves using SPLIT responses so the arbiter can grant a master which is guaranteed not to perform any real transfers.
What is burst operation in AHB?
Bursts of 4, 8, and 16-beats, undefined length bursts, and single transfers are defined in this protocol. It supports incrementing and wrapping bursts: Incrementing bursts access sequential locations and the address of each transfer in the burst is an increment of the previous address.
What is narrow transfer in AXI?
When a master generates a transfer that is narrower than its data bus, the address and control information determine which byte lanes the transfer uses. In incrementing or wrapping bursts, different byte lanes transfer the data on each beat of the burst.
What is early bus termination in AHB?
Bursts can be early terminated either as a result of the Arbiter removing the HGRANT to a master part way through a burst, or after a slave returns a non-OKAY response to any beat of a burst.