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ST25DV64K Datasheet(PDF) 118 Page - STMicroelectronics |
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ST25DV64K Datasheet(HTML) 118 Page - STMicroelectronics |
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118 / 200 page  Figure 58. Write Dynamic Configuration frame exchange between VCD and ST25DVxxx SOF Write Dynamic Configuration request VCD ST25DVxxx EOF SOF Write Dynamic Configuration response EOF t1 SOF Write Dynamic Configuration response EOF t1 ST25DVxxx Write Dynamic Configuration sequence when no error Write Dynamic Configuration sequence when error 7.6.30 Manage GPO On receiving the Manage GPO command. Depending on the command argument, the ST25DV force the GPO output level if RF_USER interrupt is enabled, or send a pulse on GPO output if RF_INTERRUPT is enabled. If neither RF_USER nor RF_INTERRUPT was enabled, the command is not executed and ST25DVxxx responds an Error code “0F”. The IT duration is defined by IT_TIME register and occurs just after the command response. For the ST25DVxx-JF (CMOS output), a set means that the GPO pin is driven to a High level (VDCG) and a Reset pulls the GPO pin to a low level (VSS). The IT corresponds to a transmission of a positive pulse on the GPO pin. For the ST25DVxx-IE (open drain output), a Set means that the GPO pin is driven to a low level (VSS) and a Reset releases the GPO (High impedance). IT corresponds to the GPO pin driven to ground during the IT duration, then pin is released. Thanks to an external pull up, the high level will be recovered. Option_flag is not supported. The Inventory_flag must be set to 0. Table 193. ManageGPO request format Request SOF Request_ flags ManageGPO IC Mfg code UID (1) GPO VAL(2) CRC16 Request EOF - 8 bits A9h 02h 64 bits 8 bits 16 bits - 1. This field is optional. 2. See Table 194 Table 194. GPOVAL GPOVAL IT ST25DVxx-IE (OD) ST25DVxx-JF (CMOS) 0xxxxxx0b RF_USER enabled Pin pull to 0 GPO Pin set to logic One (VDCG) 0xxxxxx1b RF_USER enabled Pin released (HZ) GPO Pin reset to logic zero 1xxxxxxxb RF_INTERRUPT enabled GPO pin pulled to 0 during IT Time then released (HZ) GPO Pin drives a positive pulse Any other conditions GPO released (Hz) GPO pin reset to logic zero Request parameters: • Request flag • UID (optional) • Data: Define static or dynamic Interrupt ST25DV04K ST25DV16K ST25DV64K RF commands DS10925 - Rev 9 page 118/200 |
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