Atmel Wireless LAN Access Point Uživatelský manuál stáhnout pdf (Strana 14)

Atmel ATWILC1500-MR [PRELIMINARY DATASHEET]

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

Figure 6-1. ATWINC1500 Pad ESD structure

This shows why it is important that any time Chip_En to the module is low, all pins interfacing to the module

must not be driven or pulled high. They should either be set to a low level or high impedance state. This means

that if any external pull-up resistors are attached to any pins they should be disconnected from the supply when

Chip_En is low.

Figure 6-2. Current Path through ESD diode

7. Notes On Interfacing To The ATWINC1500-MR210P

7.1 Programmable Pull Up Resistors

The ATWINC1500-MR210PA provides programmable pull-up resistors on various pins. The purpose of these

resistors is to keep any unused input pins from floating which can cause excess current to flow through the input

buffer from the VDDIO supply. Any unused module pin on the ATWINC1500-MR210P should leave these pull-

up resistors enabled so the pin will not float. The default state at power up is for the pull-up resistor to be

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Atmel Wireless LAN Access Point Uživatelský manuál Strana 14