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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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PM0056 Datasheet(PDF) 17 Page - STMicroelectronics |
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PM0056 Datasheet(HTML) 17 Page - STMicroelectronics |
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17 / 156 page  DocID15491 Rev 5 17/156 PM0056 The Cortex-M3 processor Application program status register The APSR contains the current state of the condition flags from previous instruction executions. See the register summary in Table 2 on page 14 for its attributes. The bit assignments are: Table 4. 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: 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. This bit is cleared to zero by software using an MRS instruction. Bits 26:0 Reserved. |
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