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KSZ9893R Datenblatt(PDF) 22 Page - Microchip Technology

Teilenummer KSZ9893R
Bauteilbeschribung  3-Port Gigabit Ethernet Switch with RGMII/MII/RMII Interface
PDF  189 Pages
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Hersteller  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

KSZ9893R Datenblatt(HTML) 22 Page - Microchip Technology

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KSZ9893R
DS00002420D-page 22
 2017-2018 Microchip Technology Inc.
- Set Port N (1-2), PHY Remote Loopback Register = 0x01F0
- Set Port N (1-2), PHY Basic Control Register = 0x3300
4.2
LEDs
Each PHY port has two programmable LED output pins, LEDx_0 and LEDx_1, to indicate the PHY link and activity sta-
tus. Two different LED modes are available. The LED mode can be changed individually for each PHY port by writing
to the PHY Mode bit in the PHY indirect register: MMD 2, address 0, bit 4:
•1 = Single-LED Mode
•0 = Tri-Color Dual-LED Mode (Default)
Each LED output pin can directly drive an LED with a series resistor (typically 220Ω to 470Ω). LED outputs are active-
low.
4.2.1
SINGLE-LED MODE
In single-LED mode, the LEDx_1 pin indicates the link status while the LEDx_0 pin indicates the activity status, as shown
in Table 4-2.
4.2.2
TRI-COLOR DUAL-LED MODE
In tri-color dual-LED mode, the link and activity status are indicated by the LEDx_1 pin for 1000BASE-T; by the LEDx_0
pin for 100BASE-TX; and by both LEDx_1 and LEDx_0 pins, working in conjunction, for 10BASE-T. This behavior is
summarized in Table 4-3.
TABLE 4-2:
SINGLE-LED MODE PIN DEFINITION
LED Pin
Pin State
Pin LED Definition
Link/Activity
LEDx_1
HOFF
Link Off
L
ON
Link On (any speed)
LEDx_0
H
OFF
No Activity
Toggle
Blinking
Activity (RX,TX)
TABLE 4-3:
TRI-COLOR DUAL-LED MODE PIN DEFINITION
LED Pin (State)
LED Pin (Definition)
Link/Activity
LEDx_1
LEDx_0
LEDx_1
LEDx_0
H
H
OFF
OFF
Link off
L
H
ON
OFF
1000Mbps Link / No Activity
Toggle
H
Blinking
OFF
1000Mbps Link / Activity (RX,TX)
H
L
OFF
ON
100Mbps Link / No Activity
H
Toggle
OFF
Blinking
100Mbps Link / Activity (RX,TX)
L
L
ON
ON
10Mbps Link / No Activity
Toggle
Toggle
Blinking
Blinking
10Mbps Link / Activity (RX,TX)



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