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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) 190 Page - STMicroelectronics |
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PM0214 датащи(HTML) 190 Page - STMicroelectronics |
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190 / 245 page  Core peripherals PM0214 190/245 DocID022708 Rev 4 SIZE field values The SIZE field defines the size of the MPU memory region specified by the MPU_RNR regsiter as follows: (Region size in bytes) = 2(SIZE+1) The smallest permitted region size is 32B, corresponding to a SIZE value of 4. Table 43 gives example SIZE values, with the corresponding region size and value of N in the MPU_RBAR. Bits 15:8 SRD: Subregion disable bits. For each bit in this field: 0: corresponding sub-region is enabled 1: corresponding sub-region is disabled See Subregions on page 183 for more information. Region sizes of 128 bytes and less do not support subregions. When writing the attributes for such a region, write the SRD field as 0x00. Bits 7:6 Reserved, forced by hardware to 0. Bits 5:1 SIZE: Size of the MPU protection region. The minimum permitted value is 3 (b00010), see SIZE field values for more information. Bit 0 ENABLE: Region enable bit. Table 43. Example SIZE field values SIZE value Region size Value of N(1) 1. In the MPU_RBAR register see Section 4.2.8 on page 188 Note b00100 (4) 32B 5 Minimum permitted size b01001 (9) 1KB 10 - b10011 (19) 1MB 20 - b11101 (29) 1GB 30 - b11111 (31) 4GB b01100 Maximum possible size |
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