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LAN9250 Datasheet(PDF) 389 Page - Microchip Technology

Part # LAN9250
Description  Integrated Ethernet PHY with HP Auto-MDIX
PDF  421 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN9250 Datasheet(HTML) 389 Page - Microchip Technology

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 2015 Microchip Technology Inc.
DS00001913A-page 389
LAN9250
2:0
GPIO Buffer Type 2-0 (GPIOBUF[2:0])
This field sets the buffer types of the 3 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 regis-
ter is set.
As an open-drain driver used for 1588 Clock Events, the corresponding
GPIO_POL_x bit determines when the corresponding pin is driven per the
following table:
R/W
000b
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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