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OM25180FDKM Datasheet(PDF) 67 Page - NXP Semiconductors |
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OM25180FDKM Datasheet(HTML) 67 Page - NXP Semiconductors |
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67 / 149 page  PN5180 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. Product data sheet COMPANY PUBLIC Rev. 3.0 — 7 October 2016 240930 67 of 149 NXP Semiconductors PN5180 High-performance multi-protocol full NFC Forum-compliant frontend 11.8.5 Adaptive Waveform Control (AWC) Depending on the level of detected detuning of the antenna, RF wave shaping related register settings can be automatically updated. The shaping related register settings are stored in a lookup table located in EEPROM, and selected dependent on the actual gear. The gear numbers need to be provided as part of the lookup table entries and need to be provided in ascending order in the EEPROM. Each lookup table entry allows configuring not only a dedicated wave shaping configuration for the corresponding gear, but in additionally it is possible to configure for this gear the wave shaping configuration dependent on the different protocols. Each lookup table item contains a bitmask of technology and baud rate (in order to use an entry for multiple technologies and baudrates), the DPC Gear and a relative value (change compared to actual setting of register RF_CONTROL_TX) for TAU_MODE_FALLING, TAU_MODE_RISING and TX_RESIDUAL_CARRIER. If there is a gear switch, a EEPROM lookup is performed if the current gear (at current protocol and baud rate) has an assigned wave shaping configuration. In case of an execution of a LoadProtocol command, this lookup will be performed (example: switching from baud rate A106 to A424) as well. The change from the wave shaping configuration Table 61. Wave shaping lookup table Bit position Function of each DWORD 29:31 RFU 16:28 Bitmask identifying technology and baud rate 0001h A 106 0002h A 212 0004h A 424 0008h A 848 0010h B 106 0020h B 212 0040h B 424 0080h B 848 0100h F 212 0200h F424 0400h ISO/IEC 15693 ASK10 0800h ISO/IEC 15693 ASK100 1000h ISO/IEC 18000m3 12_15 RESIDUAL_CARRIER (Sign bit + 3-bit value) 0: Add value to current residual carrier configuration, 1; subtract value from current residual carrier configuration 8:11 TAU_MOD_RISING (Sign bit + 3-bit value) 0: Add value to current TAU_MOD_RISING configuration, 1; subtract value from current TAU_MOD_RISING configuration 4:7 TAU_MOD_FALLING (Sign bit + 3-bit value) 0: Add value to current TAU_MOD_FALLING configuration, 1; subtract value from current TAU_MOD_FALLING configuration 0:3 DPC Gear |
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