AMBA Design Kit Technical Reference Manual - ARM Information ...

Behavioral ModelsThe following AHB-Lite FRM functions are described in this section:• Write command• Read command on page 5-11• Sequential command on page 5-12• Busy command on page 5-13• Idle command on page 5-14• Poll command on page 5-16• Loop command on page 5-17• Resp field on page 5-18• Clock and reset on page 5-18• Error reporting at runtime on page 5-18• End of stimulus on page 5-19.Write commandThe write command W starts a write burst and can be followed by one or more S vectors.For bursts of fixed length, the Burst field determines the number of S vectors. For burstsof undefined length, there can be any number of S vectors as long as they do not causethe address to cross a 1K boundary.Figure 5-6 shows the write command timing diagram.Cycle 1 Cycle 2CommandHADDRHTRANSWA1NONSEQHWDATAD1HWRITEHREADYFigure 5-6 Write command timing5-10 Copyright © 2003, 2007 ARM Limited. All rights reserved. ARM DDI 0243C