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LAN9313 Datasheet(PDF) 156 Page - SMSC Corporation |
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LAN9313 Datasheet(HTML) 156 Page - SMSC Corporation |
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156 / 398 page  Three Port 10/100 Managed Ethernet Switch with MII Datasheet Revision 1.2 (04-08-08) 156 SMSC LAN9313/LAN9313i DATASHEET 11:0 GPIO Buffer Type 11-0 (GPIOBUF[11:0]) This field sets the buffer types of the 12 GPIO pins. 0: Corresponding GPIO pin configured as an open-drain driver 1: Corresponding GPIO pin configured as a push/pull driver As an open-drain driver, the output pin is driven low when the corresponding data register is cleared, and is not driven when the corresponding data register is set. As an open-drain driver used for 1588 Clock Events, the corresponding GPIO_EVENT_POL_8 and GPIO_EVENT_POL_9 bits determine when the corresponding pin is driven per the following table: R/W 0h BITS DESCRIPTION TYPE DEFAULT GPIOx Clock Event Polarity 1588 Clock Event Pin State 0 no not driven 0 yes driven low 1 no driven low 1 yes not driven |
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