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

Behavioral ModelsCycle 1 Cycle 2 Cycle 1 Cycle 2CommandPHADDRAAHTRANSNONSEQIDLENONSEQIDLEHRDATAD'DHWRITEHREADYFigure 5-13 Poll command timingThe poll command operates as follows:Cycle 1Cycle 2The file reader sets up a read of the single address in the Address field.If HREADY is asserted, the file reader proceeds to the second controlphase.The file reader issues an IDLE transfer, reads the data for the previousaddress value.Loop commandThe loop command L repeats the last command a number of times. When the burst typeis INCR or SINGLE, a loop command must follow only a write or read. Because thefile reader has a 32-bit counter, the maximum number of loops is 2 32 -1.NoteCommands that do not directly represent bus transactions, for example, the simulationcomment command C, are not looped. Consecutive loops are cumulative and notmultiplicative. For example:I 0x4000C Commencing IDLESL 1000L 1000ARM DDI 0243C Copyright © 2003, 2007 ARM Limited. All rights reserved. 5-17