ARM ARM DUI 0224I manual Sysbootcs, Boot configuration switches

Models: ARM DUI 0224I

1 402
Download 402 pages 14.06 Kb
Page 201
Image 201

Programmer’s Reference

 

 

 

Figure 4-16 SYS_BOOTCS

 

 

 

Table 4-16 BOOT configuration switches

 

 

 

Bits

Access

Description

 

 

 

[31:8]

-

Reserved. Use read-modify-write to preserve value.

 

 

 

[7]

Read

Stack image (RealView Logic Tile image 0 or 1). The default is tile image 0 (S1-8

 

 

OFF).

 

 

 

[6:5]

Read

FPGA image to load on power on.

 

 

b00

Image 0 (default, S1-7 and S1-6 OFF)

 

 

b01

Image 1

 

 

b10

Image 2

 

 

b11

Image 3

 

 

 

[4]

Read

Low-frequency startup mode. If 1, OSCCLC0 is programmed to generate a 10MHz

 

 

reference clock instead of a 35MHz reference. The default is 0 (S1-5 OFF).

 

 

 

[3]

Read

Reserved. S1-4 must be set to 0 (OFF)

 

 

 

[2]

Read

If 1, the AHB bus bridge operates in asynchronous mode instead of synchronous

 

 

mode. The default is 0 (S1-3 OFF).

 

 

 

[1:0]

Read

Static boot memory select switches (S1-2 and S1-1)

 

 

b00

NOR flash 2

 

 

b01

NOR flash 1 (default setting)

 

 

b10

Static expansion memory

 

 

b11

AHB expansion memory

 

 

 

 

ARM DUI 0224I

Copyright © 2003-2010 ARM Limited. All rights reserved.

4-35

Page 201
Image 201
ARM ARM DUI 0224I manual Sysbootcs, Boot configuration switches