Debug

 

31

4

3

2

1

0

 

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sticky reset status

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset status

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sticky power-down status

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power-down status

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 11-15 PRSR format

 

Table 11-24shows how the bit values correspond with the PRSR functions.

 

 

 

 

 

 

 

 

 

 

 

 

Table 11-24 PRSR functions

 

 

 

 

 

 

 

 

 

 

 

 

Bits

Field

Function

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[31:4]

Reserved

Do not modify on writes. On reads, the value returns zero.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[3]

Sticky reset status

Sticky reset status bit. This bit is cleared on read.

 

 

 

 

 

 

 

 

 

 

 

 

0 = the processor has not been reset since the last time this register was read. This

 

 

 

is the reset value.

 

 

 

 

 

 

 

 

 

 

 

 

1 = the processor has been reset since the last time this register was read.

 

 

 

 

 

 

 

 

 

 

This sticky bit is set to 1 when nSYSPORESET is asserted.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[2]

Reset status

Reset status bit:

 

 

 

 

 

 

 

 

 

 

 

 

0 = the processor is not currently held in reset

 

 

 

 

 

 

 

 

 

 

 

 

1 = the processor is currently held in reset.

 

 

 

 

 

 

 

 

 

 

 

 

This bit reads 1 when nSYSPORESET is asserted.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[1]

Sticky power-down status

Reserved. Always zero.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[0]

Power-down status

Reserved. Always one.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ARM DDI 0363E

Copyright © 2009 ARM Limited. All rights reserved.

11-31

ID013010

Non-Confidential, Unrestricted Access

 

Page 300
Image 300
ARM R4F, r1p3 manual Prsr format, Prsr functions