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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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NRF52811-QCAA-R bảng dữ liệu(PDF) 227 Page - Nordic Semiconductor |
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NRF52811-QCAA-R bảng dữ liệu(HTML) 227 Page - Nordic Semiconductor |
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227 / 444 page  Peripherals Bit number 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 ID B B A A Reset 0x00000000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ID Access Field Value ID Value Description A RW LEN [1..3] CRC length in number of bytes. Note: For MODE Ble_LR125Kbit and Ble_LR500Kbit, only LEN set to 3 is supported Disabled 0 CRC length is zero and CRC calculation is disabled One 1 CRC length is one byte and CRC calculation is enabled Two 2 CRC length is two bytes and CRC calculation is enabled Three 3 CRC length is three bytes and CRC calculation is enabled B RW SKIPADDR Include or exclude packet address field out of CRC calculation. Include 0 CRC calculation includes address field Skip 1 CRC calculation does not include address field. The CRC calculation will start at the first byte after the address. Ieee802154 2 CRC calculation as per 802.15.4 standard. Starting at first byte after length field. 6.14.15.60 CRCPOLY Address offset: 0x538 CRC polynomial Bit number 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 ID A A A A A A A A A A A A A A A A A A A A A A A A Reset 0x00000000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ID Access Field Value ID Value Description A RW CRCPOLY CRC polynomial Each term in the CRC polynomial is mapped to a bit in this register which index corresponds to the term's exponent. The least significant term/bit is hardwired internally to 1, and bit number 0 of the register content is ignored by the hardware. The following example is for an 8 bit CRC polynomial: x8 + x7 + x3 + x2 + 1 = 1 1000 1101 . 6.14.15.61 CRCINIT Address offset: 0x53C CRC initial value Bit number 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 ID A A A A A A A A A A A A A A A A A A A A A A A A Reset 0x00000000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ID Access Field Value ID Value Description A RW CRCINIT CRC initial value Initial value for CRC calculation 6.14.15.62 TIFS Address offset: 0x544 4454_140 v1.0 227 |
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