CMSIS-Core (Cortex-M)  Version 5.5.0
CMSIS-Core support for Cortex-M processor-based devices
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xPSR_Type Union Reference

Union type to access the Special-Purpose Program Status Registers (xPSR). More...

Data Fields

struct {
   uint32_t   ISR:9
 bit: 0.. 8 Exception number More...
 
   uint32_t   _reserved0:15
 bit: 9..23 Reserved More...
 
   uint32_t   T:1
 bit: 24 Thumb bit (read 0) More...
 
   uint32_t   IT:2
 bit: 25..26 saved IT state (read 0) More...
 
   uint32_t   Q:1
 bit: 27 Saturation condition flag More...
 
   uint32_t   V:1
 bit: 28 Overflow condition code flag More...
 
   uint32_t   C:1
 bit: 29 Carry condition code flag More...
 
   uint32_t   Z:1
 bit: 30 Zero condition code flag More...
 
   uint32_t   N:1
 bit: 31 Negative condition code flag More...
 
b
 Structure used for bit access. More...
 
uint32_t w
 Type used for word access. More...
 

Description

Union type to access the Special-Purpose Program Status Registers (xPSR).

Field Documentation

uint32_t xPSR_Type::_reserved0

bit: 9..23 Reserved

struct { ... } xPSR_Type::b

Structure used for bit access.

uint32_t xPSR_Type::C

bit: 29 Carry condition code flag

uint32_t xPSR_Type::ISR

bit: 0.. 8 Exception number

uint32_t xPSR_Type::IT

bit: 25..26 saved IT state (read 0)

uint32_t xPSR_Type::N

bit: 31 Negative condition code flag

uint32_t xPSR_Type::Q

bit: 27 Saturation condition flag

uint32_t xPSR_Type::T

bit: 24 Thumb bit (read 0)

uint32_t xPSR_Type::V

bit: 28 Overflow condition code flag

uint32_t xPSR_Type::w

Type used for word access.

uint32_t xPSR_Type::Z

bit: 30 Zero condition code flag