EasyManua.ls Logo

NXP Semiconductors LPC1768 - System Handler Priority Register 1; System Handler Priority Register 2; System Handler Priority Register 3; System Handler Control and State Register

NXP Semiconductors LPC1768
841 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
UM10360 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
User manual Rev. 3 — 20 December 2013 776 of 841
NXP Semiconductors
UM10360
Chapter 34: Appendix: Cortex-M3 user guide
Each PRI_N field is 8 bits wide, but the processor implements only bits[7:3] of each field,
and bits[2:0] read as zero and ignore writes.
34.4.3.9.1 System Handler Priority Register 1
The bit assignments are shown in Table 664
.
34.4.3.9.2 System Handler Priority Register 2
The bit assignments are shown in Table 665
.
34.4.3.9.3 System Handler Priority Register 3
The bit assignments are shown in Table 666
.
34.4.3.10 System Handler Control and State Register
The SHCSR enables the system handlers, and indicates:
the pending status of the bus fault, memory management fault, and SVC exceptions
the active status of the system handlers.
See the register summary in Table 654
for the SHCSR attributes. The bit assignments are
shown in Table 667
.
Table 663. System fault handler priority fields
Handler Field Register description
Memory management fault PRI_4 Table 664
Bus fault PRI_5
Usage fault PRI_6
SVCall PRI_11 Table 665
PendSV PRI_14 Table 666
SysTick PRI_15
Table 664. SHPR1 register bit assignments
Bits Name Function
[31:24] PRI_7 Reserved
[23:16] PRI_6 Priority of system handler 6, usage fault
[15:8] PRI_5 Priority of system handler 5, bus fault
[7:0] PRI_4 Priority of system handler 4, memory management fault
Table 665. SHPR2 register bit assignments
Bits Name Function
[31:24] PRI_11 Priority of system handler 11, SVCall
[23:0] - Reserved
Table 666. SHPR3 register bit assignments
Bits Name Function
[31:24] PRI_15 Priority of system handler 15, SysTick exception
[23:16] PRI_14 Priority of system handler 14, PendSV
[15:0] - Reserved

Table of Contents

Other manuals for NXP Semiconductors LPC1768

Related product manuals