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CLRC663 Datasheet(PDF) 22 Page - NXP Semiconductors |
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CLRC663 Datasheet(HTML) 22 Page - NXP Semiconductors |
22 / 132 page ![]() CLRC663 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved. Product data sheet COMPANY PUBLIC Rev. 3.3 — 3 April 2012 171133 22 of 132 NXP Semiconductors CLRC663 Contactless reader IC The selectable transfer speeds as shown are calculated according to the following formulas: if BR_T0 = 0: transfer speed = 27.12 MHz / (BR_T1 + 1) if BR_T0 > 0: transfer speed = 27.12 MHz / (BR_T1 + 33)/2(BR_T0 1) Remark: Transfer speeds above 1228.8 KBits/s are not supported. 8.4.3.2 Framing Remark: For data and address bytes the LSB bit has to be sent first. No parity bit is used during transmission. Read data: To read out data using the UART interface the flow described below has to be used. The first send byte defines both the mode itself and the address.The Trigger on pin IF3 has to be set, otherwise no read of data is possible. 38.4 AB 0.32 57.6 9A 0.25 115.2 7A 0.25 128 74 0.06 230.4 5A 0.25 460.8 3A 0.25 921.6 1C 1.45 1228.8 15 0.32 Table 20. Selectable transfer speeds Transfer speed (kbit/s) Serial SpeedReg Transfer speed accuracy (%) (Hex.) Table 21. UART framing Bit Length Value Start bit (Sa) 1 bit 0 Data bits 8 bit Data Stop bit (So) 1 bit 1 Table 22. Byte Order to Read Data Mode byte 0 byte 1 RX address - TX - data 0 |
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