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OM25180FDKM Datasheet(PDF) 89 Page - NXP Semiconductors |
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OM25180FDKM Datasheet(HTML) 89 Page - NXP Semiconductors |
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89 / 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 89 of 149 NXP Semiconductors PN5180 High-performance multi-protocol full NFC Forum-compliant frontend 9 T1_START_ON_RF_OFF_EXT R/W 0* T1_START_EVENT: If set; the timer T1 is started when the external RF field is not detected any more. 8 T1_START_ON_RF_ON_INT R/W 0* T1_START_EVENT: If set; the timer T1 is started when an internal RF field is turned on. 7 T1_START_ON_RF_OFF_INT R/W 0* T1_START_EVENT: If set; the timer T1 is started when an internal RF field is turned off. 6 T1_START_NOW R/W 0* T1_START_EVENT: If set; the timer T1 is started immediately. 3:5 T1_PRESCALE_SEL R/W 000b* Controls frequency/period of the timer T1 when the prescaler is activated in T1_MODE_SEL: 000b 6.78 MHz counter 001b 3.39 MHz counter 010b 1.70 MHz counter 011b 848 kHz counter 100b 424 kHz counter 101b 212 kHz counter 110b 106 kHz counter 111b 53 kHz counter 2 T1_MODE_SEL R/W 0* Configuration of the timer T1 clock. 0b* Prescaler is disabled: the timer frequency matches CLIF clock frequency (13.56 MHz). 1b Prescaler is enabled: the timer operates on the prescaler signal frequency (chosen by T1_PRESCALE_SEL). 1 T1_RELOAD_ENABLE R/W 0* If set to 0; the timer T1 stops on expiration. 0* After expiration the timer T1 stops counting; i.e.; remain zero; reset value. 1 After expiration the timer T1 reloads its preset value and continues counting down. 0 T1_ENABLE R/W 0* Enables the timer T1 Table 79. TIMER1_CONFIG register (address 000Fh) bit description …continued Bit Symbol Access Value Description Table 80. TIMER2_CONFIG register (address 0010h) bit description Bit Symbol Access Value Description 20 T2_STOP_ON_RX_STARTED R/W 0* T2_STOP_EVENT: If set; the timer T2 is stopped when a data reception begins and the first 4 bits had been received. The additional delay of the timer is protocol-dependent and listed in the appendix. 19 T2_STOP_ON_TX_STARTED R/W 0* T2_STOP_EVENT: If set; the timer T2 is stopped when a data transmission begins. 18 T2_STOP_ON_RF_ON_EXT R/W 0* T2_STOP_EVENT: If set; the timer T2 is stopped when the external RF field is detected. 17 T2_STOP_ON_RF_OFF_EXT R/W 0* T2_STOP_EVENT: If set; the timer T2 is stopped when the external RF field vanishes. 16 T2_STOP_ON_RF_ON_INT R/W 0* T2_STOP_EVENT: If set; the timer T2 is stopped when the internal RF field is turned on. 15 T2_STOP_ON_RF_OFF_INT R/W 0* T2_STOP_EVENT: If set; the timer T2 is stopped when the internal RF field is turned off. 14 T2_START_ON_RX_STARTED R/W 0* T2_START_EVENT: If set; the timer T2 is started when a data reception begins (first bit is received). |
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