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

APB ComponentsThe functionality in Table 4-11 on page 4-10 is the same as the retry slave described inExample retry slave on page 3-10, except there is no requirement to generate wait statesand responses, and all data is a fixed size (32-bit).NoteAddress locations 0x2C-0xFDC read as zero and perform no operation when written to.The peripheral ID information is arranged as four 8-bit registers that span addresslocations 0xFE0-0xFEC. The registers can conceptually be treated as a 32-bit read-onlyregister. Table 4-12 lists the format of this information and the values for the peripheral.Table 4-12 Peripheral ID formatRegister fieldPart number [11:0]DescriptionThis identifies the peripheral. The three digit product code 0x806 is used.Designer ID [19:12] This is the identification of the designer. ARM Limited is 0x41, ASCII A.Revision [23:20] This is the revision number of the peripheral. The revision number starts from 0.Configuration [31:24] This is the configuration option of the peripheral. The configuration value is 0.4.2.2 Signal descriptionsThe example APB slave uses only AMBA signals. For a description of the AMBAsignals, see AMBA signals on page 1-3.ARM DDI 0243C Copyright © 2003, 2007 ARM Limited. All rights reserved. 4-11