PM0214 datasheet(20/245 Pages) STMICROELECTRONICS

20 / 245 page

The Cortex-M4 processor

PM0214

20/245

DocID022708 Rev 4

Application program status register

The APSR contains the current state of the condition flags from previous instruction

executions. See the register summary in Table 3 on page 17 for its attributes. The bit

assignments are:

Table 5. APSR bit definitions

Bits

Description

Bit 31

N: Negative or less than flag:

0: Operation result was positive, zero, greater than, or equal

1: Operation result was negative or less than.

Bit 30

Z: Zero flag:

0: Operation result was not zero

1: Operation result was zero.

Bit 29

C: Carry or borrow flag:

0: Add operation did not result in a carry bit or subtract operation resulted in a

borrow bit

1: Add operation resulted in a carry bit or subtract operation did not result in a

borrow bit.

Bit 28

V: Overflow flag:

0: Operation did not result in an overflow

1: Operation resulted in an overflow.

Bit 27

Q: DSP overflow and saturation flag: Sticky saturation flag.

0: Indicates that saturation has not occurred since reset or since the bit was last

cleared to zero

1: Indicates when an SSAT or USAT instruction results in saturation, or indicates a

DSP overflow.

This bit is cleared to zero by software using an MRS instruction.

Bits 26:20

Reserved.

Bits 19:16

GE[3:0]: Greater than or Equal flags. See

SEL on page 104 for more information.

Bits 15:0

Reserved.

PM0214 Datasheet(PDF) 20 Page - STMicroelectronics

PM0214 Datasheet(HTML) 20 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Descarga

Enlace URL