PDF version - ARM Information Center

Programmer’s Reference for the MPS RTSMsThe ability to remap the static RAM into the bottom of memory (overlaying the Flash) isrequired for booting and code execution to allow the interrupt vector table to be modified. It isalso used to allow boot code execution from SRAM for code development, rather thanprogramming the FLASH each time.The aliasing of the Flash memory into SRAM space is required to allow the Flash memory tobe reprogrammed at this offset. It also allows for full flash memory access when remapping isenabled. If remapping of flash is disabled only the Flash memory above 4MB is accessible.SwitchesTable 4-6 lists the bits for the user switch inputs.Name Bits Access Reset NoteReserved 31:8 - - -Table 4-6 User switchesUSER_BUT[3:0] 7:4 RO - Always returns value of userbuttonsUSER_SW[3:0] 3:0 RO - Always returns value of userswitchesSeven-segment displayTable 4-7 lists the bits that control the seven-segment display.Table 4-7 Seven-segment registerName Bits Access Reset NoteDISP3 31:24 RW 0x00 Segments for display 3DISP2 23:16 RW 0x00 Segments for display 2DISP1 15:8 RW 0x00 Segments for display 1DISP0 7:0 RW 0x00 Segments for display 0ARM DUI 0575A Copyright © 2011 ARM. All rights reserved. 4-5ID051811Non-Confidential