Datasheet

KSZ8081MNX/RNB
DS00002202C-page 12  2016-2018 Microchip Technology Inc.
Note 2-1 P = Power supply. GND = Ground. I = Input. O = Output. I/O = Bi-directional. Ipu = Input with internal
pull-up (see
Electrical Characteristics for value). Ipu/O = Input with internal pull-up (see Electrical
Characteristics for value) during power-up/reset; output pin otherwise. Ipd/O = Input with internal pull-
down (see Electrical Characteristics for value) during power-up/reset; output pin otherwise. Ipu/Opu
28 CONFIG0 Ipd/O
The pull-up/pull-down value is latched as CONFIG0 at the
de-assertion of reset. See the Strap-in Options –
KSZ8081RNB section for details.
29 CONFIG1 Ipd/O
The pull-up/pull-down value is latched as CONFIG1 at the
de-assertion of reset. See the
Strap-in Options –
KSZ8081RNB section for details.
30
LED0/
NWAYEN
Ipu/O
LED Output: Programmable LED0 Output.
Config Mode: Latched as auto-negotiation enable (Regis-
ter 0h, Bit [12]) at the de-assertion of reset.
See the Strap-in Options – KSZ8081RNB section for
details.
The LED0 pin is programmable using Register 1Fh bits
[5:4], and is defined as follows:
LED Mode = [10], [11] Reserved
31 LED1/ SPEED Ipu/O
LED Output: Programmable LED1 Output.
Config Mode: Latched as Speed (Register 0h, Bit [13]) at
the de-assertion of reset.
See the Strap-in Options – KSZ8081RNB section for
details.
The LED1 pin is programmable using Register 1Fh bits
[5:4], and is defined as follows:
LED Mode = [10], [11] Reserved
32 RST# Ipu Chip Reset (active low).
PADDLE GND GND Ground.
TABLE 2-3: PIN DESCRIPTION — KSZ8081RNB (CONTINUED)
Pin Number Pin Name Type (Note 2-1) Pin Function
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
LED Mode = [00]
Speed Pin State LED Definition
10Base-T High OFF
100Base-TX Low ON
LED Mode = [01]
Activity Pin State LED Definition
No activity High OFF
Activity Toggle Blinking