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NRF52811-QCAA-R bảng dữ liệu(PDF) 338 Page - Nordic Semiconductor |
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NRF52811-QCAA-R bảng dữ liệu(HTML) 338 Page - Nordic Semiconductor |
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338 / 444 page ![]() Peripherals 6.23.8.20 TXD Address offset: 0x51C TXD register 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 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 TXD TXD register 6.23.8.21 FREQUENCY Address offset: 0x524 TWI frequency. Accuracy depends on the HFCLK source selected. 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 A A A A A A A A Reset 0x04000000 0 0 0 0 0 1 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 FREQUENCY TWI master clock frequency K100 0x01980000 100 kbps K250 0x04000000 250 kbps K400 0x06680000 400 kbps (actual rate 410.256 kbps) 6.23.8.22 ADDRESS Address offset: 0x588 Address used in the TWI transfer 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 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 ADDRESS Address used in the TWI transfer 6.23.9 Electrical specification 6.23.9.1 TWI interface electrical specifications Symbol Description Min. Typ. Max. Units fTWI,SCL Bit rates for TWI29 100 400 kbps tTWI,START Time from STARTRX/STARTTX task to transmission started 1.5 µs 29 High bit rates or stronger pull-ups may require GPIOs to be set as High Drive, see GPIO chapter for more details. 4454_140 v1.0 338 |
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