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ST25R3911B Datasheet(PDF) 100 Page - STMicroelectronics |
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ST25R3911B Datasheet(HTML) 100 Page - STMicroelectronics |
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100 / 116 page  3.3.2 CMOS outputs Valid for output pins MISO, IRQ and MCU_CLK, io_18=0 (IO configuration register 2). Table 100. CMOS outputs Symbol Parameter Conditions Min Typ Max Unit VOH High level output voltage tSOURCE/SINK = 1mA, measured at VDDIO = 2.4V tSOURCE/SINK = 0.5mA, measured at VDDIO = 1.65V 0.9 + VDD_IO - VDD_IO V VOL Low level output voltage 0 - 0.1 + VDD_IO V CL Capacitive load - 0 - 50 pF RO Output resistance - 0 250 550 Ω RPD Pull-down resistance pin MISO Pull-down can be enabled while MISO output is in tristate. The activation is controlled by register setting. 5 10 15 kΩ 3.4 Electrical specifications VDD= 3.3 V, temperature 25 °C unless noted otherwise. 3.3 V supply mode, regulated voltages set to 3.4 V, 27.12 MHz Xtal connected to XTO and XTI. Table 101. Electrical specifications Symbol Parameter Min Typ Max Unit Comments IPD Supply current in Power-down mode - 0.7 2 µA Register 00h set to 0Fh(no clock on MCU_CLK), register 01h set to 80h (3 V supply mode), register 02hset to 00h register 03hset to 08h, other registers in default state. INFCT Supply current in initial NFC Target mode - 3.5 7 µA Register 00hset to 0Fh (no clock on MCU_CLK), register 01h set to 80h (3 V supply mode), register 02hset to 00h register 03h set to 80h(enable NFC Target mode), other registers in default state. IWU Supply current in Wake-up mode - 3.6 8 µA Register 00h set to 0Fh (no clock on MCU_CLK), register 01h set to 80h (3 V supply mode), register 02h set to 04h (enable Wake-up mode), register 03hset to 08h, register 31h set to 08h (100 ms timeout, IRQ at every timeout), other registers in default state. IRD Supply current in Ready mode - 5.4 7.5 mA Register 00h set to 0Fh(no clock on MCU_CLK), register 01h set to C0h(3 V supply mode, disable VSP_D), register 02h set to 80h, register 03h set to 08h, other registers in default state, short VSP_A and VSP_D. IAL Supply current, all active - 8.7 12.5 mA Register 00h set to 0Fh, register 01h set to C0h (3 V supply mode, disable VSP_D), register 02h set to E8h (one channel Rx, enable Tx), register 03h set to 08h, register 0Bh set to 00h, register 27h set to FFh (all RFO segments disabled), other registers in default state, short VSP_A and VSP_D. ILP Supply current, all active, low power receiver mode - 6.8 10 mA Register 00h set to 0Fh, register 01h set to C0h (3 V supply mode, disable VSP_D), register 02h set to E8h(one channel Rx, enable Tx), register 03h set to 08, register 0Bh set to 80 (low power mode), register 27h set to FFh (all RFO segments disabled), other registers in default state, short VSP_A and VSP_D. RRFO RFO1 and RFO2 driver output resistance 0.25 0.6 1.8 Ω IRFO = 10 mA The following measurement procedure that cancels resistance of measurement setup is used: • all driver segments are switched on, resistance is measured • all driver segments except the MSB segment are switched on, resistance is measured • difference between the two measurements is the resistance of MSB segment ST25R3911B Electrical specifications DS11793 - Rev 6 page 100/116 |
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