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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PM0214 датащи(PDF) 239 Page - STMicroelectronics |
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PM0214 датащи(HTML) 239 Page - STMicroelectronics |
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239 / 245 page  DocID022708 Rev 4 239/245 PM0214 Core peripherals 244 4.6.3 Floating-point context address register (FPCAR) Address offset: 0x08 Reset value: 0x0000000 Required privilege: Privileged The FPCAR register holds the location of the unpopulated floating-point register space allocated on an exception stack frame. 4.6.4 Floating-point status control register (FPSCR) Address offset: Not mapped Reset value: 0x0000000 Required privilege: Privileged The FPSCR register provides all necessary user level control of the floating-point system. 31 3029 28 27 26 25 24 23 22 21 20 19 18 17 16 ADDRESS[31:16] rw 15 14 13 12 11 10 9 8 76 54 3 21 0 ADDRESS[15:3] Reserved rw Bits 31:3 ADDRESS: Location of unpopulated floating-point register space allocated on an exception stack frame. Bits 2:0 Reserved. Read as Zero, Writes Ignored. 31 3029 28 27 26 25 24 23 22 21 20 19 18 17 16 NZ C V Reserv ed AHP DN FZ RMode Reserved rw rw rw rw rw rw rw rw rw 15 14 13 12 11 10 9 8 76 54 3 21 0 Reserved IDC Reserved IXC UFC OFC DZC IOC rw rw rw rw rw rw Bit 31 N: Negative condition code flag. Floating-point comparison operations update these flags. For more details on the result, refer to Table 57. 0: Operation result was positive, zero, greater than, or equal. 1: Operation result was negative or less than. Bit 30 Z: Zero condition code flag. Floating-point comparison operations update these flags. For more details on the result, refer to Table 57. 0: Operation result was not zero. 1: Operation result was zero. Bit 29 C: Carry condition code flag. Floating-point comparison operations update these flags. For more details on the result, refer to Table 57. 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. |
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