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ST25R3918 Datasheet(PDF) 5 Page - STMicroelectronics |
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ST25R3918 Datasheet(HTML) 5 Page - STMicroelectronics |
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5 / 141 page ![]() DS13490 Rev 2 5/141 ST25R3918 Contents 6 4.5.49 Auxiliary modulation setting register . . . . . . . . . . . . . . . . . . . . . . . . . . 103 4.5.50 Passive target modulation register . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 4.5.51 TX driver timing register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 4.5.52 External field detector activation threshold register . . . . . . . . . . . . . . . 106 4.5.53 Resistive AM modulation register . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 4.5.54 External field detector deactivation threshold register . . . . . . . . . . . . . 108 4.5.55 TX driver timing display register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 4.5.56 Regulator voltage control register . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 4.5.57 Regulator display register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 4.5.58 RSSI display register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 4.5.59 Gain reduction state register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 4.5.60 Auxiliary display register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115 4.5.61 Overshoot protection configuration register 1 . . . . . . . . . . . . . . . . . . . 116 4.5.62 Overshoot protection configuration register 2 . . . . . . . . . . . . . . . . . . . 116 4.5.63 Undershoot protection configuration register 1 . . . . . . . . . . . . . . . . . . 117 4.5.64 Undershoot protection configuration register 2 . . . . . . . . . . . . . . . . . . 117 4.5.65 Wake-up timer control register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 4.5.66 Amplitude measurement configuration register . . . . . . . . . . . . . . . . . . 119 4.5.67 Amplitude measurement reference register . . . . . . . . . . . . . . . . . . . . . 119 4.5.68 Amplitude measurement auto-averaging display register . . . . . . . . . . 120 4.5.69 Amplitude measurement display register . . . . . . . . . . . . . . . . . . . . . . . 120 4.5.70 Phase measurement configuration register . . . . . . . . . . . . . . . . . . . . . 121 4.5.71 Phase measurement reference register . . . . . . . . . . . . . . . . . . . . . . . 121 4.5.72 Phase measurement auto-averaging display register . . . . . . . . . . . . . 122 4.5.73 Phase measurement display register . . . . . . . . . . . . . . . . . . . . . . . . . 122 4.5.74 IC identity register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 5.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 5.2 Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 5.3 DC/AC characteristics for digital inputs and outputs . . . . . . . . . . . . . . . 126 5.4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 5.5 SPI interface characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 5.6 I2C interface characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132 6 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 |
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