Atmel Wireless LAN Access Point Manual de usuario descargar pdf (Pagina 13)

Atmel ATWILC1500-MR [PRELIMINARY DATASHEET]

Atmel-42376A-ATWINC1500-MR210P-SmartConnect-Datasheet_102014

5.4 Host Interface Power-up Sequence Timing Diagram

Figure 5-4. Host Interface Power up Sequence Timing Diagram

6. VDDIO Load Switch

The ATWINC1500-MR210P module is designed with a load switch in series with the VDDIO supply. The load

switch is controlled by the Chip_En pin of the module (Module pin 22). When Chip_En is high, the load switch is

turned on. When Chip_En is low the load switch is open and VDDIO is disconnected from the ATWINC1500-

MR210P. When the VDDIO supply to the ATWINC1500-MR210PA is disconnected it is important that none of

the pins to the ATWINC1500-MR210PA is in a high state. Figure 6-1 on page 14 shows the ESD structure of the

pins of the ATWINC1500 and Figure 6-2 on page 14 shows the current path through the ESD diode from a pin

that is being driven high to the VDDIO supply of the device. In effect, if VDDIO is disconnected from the external

power supply and a high level is driven on to a pad of the device, the device will be powered up through the pad.

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Atmel Wireless LAN Access Point Manual de usuario Pagina 13