Datasheet

2016-2018 Microchip Technology Inc. DS00002202C-page 7
KSZ8081MNX/RNB
21
INTRP/
NAND_Tree#
Ipu/Opu
Interrupt Output: Programmable Interrupt Output.
This pin has a weak pull-up, is open-drain, and requires an external
1.0 k pull-up resistor.
Config Mode: The pull-up/pull-down value is latched as NAND
Tree# at the de-assertion of reset.
See the section Strap-In Options – KSZ8081MNX for details.
22
TXC Ipd/O
MII Mode: MII Transmit Clock Output.
At the de-assertion of reset, this pin needs to latch in a pull-down
value for normal operation. If MAC side pulls this pin high, see
Register 16h, Bit [15] for solution. It is better having an external pull-
down resistor to avoid MAC side pulls this pin high.
23
TXEN I MII Mode: MII Transmit Enable input.
24
TXD0 I MII Mode: MII Transmit Data Input[0] (Note 2-4).
25
TXD1 I MII Mode: MII Transmit Data Input[1] (Note 2-4).
26
TXD2 I
MII Mode: MII Transmit Data Input[2]
(Note 2-4).
27
TXD3 I
MII Mode: MII Transmit Data Input[3] (Note 2-4).
28
COL/
CONFIG0
Ipd/O
MII Mode: MII Collision Detect output.
Config Mode: The pull-up/pull-down value is latched as CONFIG0 at
the de-assertion of reset.
See the section Strap-In Options – KSZ8081MNX for details.
29
CRS/
CONFIG1
Ipd/O
MII mode: MII Carrier Sense output
Config mode: The pull-up/pull-down value is latched as CONFIG1 at
the de-assertion of reset.
See the section Strap-In Options – KSZ8081MNX for details.
30
LED0/
NWAYEN
Ipu/O
LED Output: Programmable LED0 Output.
Config Mode: Latched as auto-negotiation enable (Register 0h, Bit
[12]) at the de-assertion of reset.
See the Strap-In Options – KSZ8081MNX section for details.
The LED0 pin is programmable using Register 1Fh bits [5:4], and is
defined as follows:
LED Mode = [10], [11] Reserved
TABLE 2-1: PIN DESCRIPTION — KSZ8081MNX (CONTINUED)
Pin
Number
Name
Buffer
Type
(Note 2-1)
Description
LED Mode = [00]
Link/Activity Pin State LED Definition
No link High OFF
Link Low ON
Activity Toggle Blinking
LED Mode = [01]
Link Pin State LED Definition
No link High OFF
Link Low ON