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ST25DV04K Datasheet(PDF) 58 Page - STMicroelectronics |
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ST25DV04K Datasheet(HTML) 58 Page - STMicroelectronics |
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58 / 220 page  ST25DVxxx specific features ST25DV04K ST25DV16K ST25DV64K 58/220 DocID027603 Rev 4 I2C host can write GPO and IT_TIME registers, after presenting a valid I2C password to open I2C security session. Enabling or disabling GPO output: • RF user and I2C host can disable or enable GPO output at power up time by writing in GPO_EN bit 7 of GPO register (if write access is granted). • I2C host can temporarily enable or disable GPO output at any time by toggling GPO_EN bit 7 of GPO_CTRL_Dyn register. No password is required to write into GPO_CTRL_Dyn register. • Disabling GPO output by writing in GPO_EN bit (either in GPO or in GPO_CTRL_Dyn registers) does not disable interruption report in IT_STS_Dyn status register. Interruption pulse duration configuration: • Interrupt pulse duration is configured by writing pulse duration value in IT_TIME register. • Pulse duration is calculated with the following equation IT pulse duration equation: Table 22. Enabling or disabling GPO interruptions GPO bit 7: GPO_EN GPO_CTRL_Dyn bit 7: GPO_EN GPO output 0 0 GPO remains High-Z (OD) or tied low (CMOS) 1 0 GPO remains High-Z (OD) or tied low (CMOS) 0 1 Activated RF events are reported on GPO output(1) 1 1 Activated RF events are reported on GPO output(1) 1. If pull-up resistor is powered (Open Drain -IE version), and VDCG is powered (CMOS –JF version). IT pulse duration 301 μs IT_TIME 37.65μs2μs ± × – = |
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