DatasheetQ Logo
Electronic component search and free download site. Transistors,MosFET ,Diode,Integrated circuits

KSZ9031RNXIA Просмотр технического описания (PDF) - Micrel

Номер в каталоге
Компоненты Описание
производитель
KSZ9031RNXIA Datasheet PDF : 82 Pages
First Prev 21 22 23 24 25 26 27 28 29 30 Next Last
Micrel, Inc.
KSZ9031RNX
Interrupt (INT_N)
The INT_N pin is an optional interrupt signal that is used to inform the external controller that there has been a status
update in the KSZ9031RNX PHY Register. Bits [15:8] of Register 1Bh are the interrupt control bits that enable and disable
the conditions for asserting the INT_N signal. Bits [7:0] of Register 1Bh are the interrupt status bits that indicate which
interrupt conditions have occurred. The interrupt status bits are cleared after reading Register 1Bh.
Bit [14] of Register 1Fh sets the interrupt level to active high or active low. The default is active low.
The MII Management bus option gives the MAC processor complete access to the KSZ9031RNX control and status
registers. Additionally, an interrupt pin eliminates the need for the processor to poll the PHY for status change.
LED Mode
The KSZ9031RNX provides two programmable LED output pins, LED2 and LED1, which are configurable to support two
LED modes. The LED mode is configured by the LED_MODE strap-in (Pin 41). It is latched at power-up/reset and is
defined as follows:
Pull-up: Single-LED mode
Pull-down: Tri-color dual-LED mode
Single-LED Mode
In single-LED mode, the LED2 pin indicates the link status while the LED1 pin indicates the activity status, as shown in
Table 9.
Table 9. Single-LED Mode – Pin Definition
LED Pin
Pin State
LED Definition
Link/Activity
LED2
LED1
H
L
H
Toggle
OFF
ON
OFF
Blinking
Link off
Link on (any speed)
No activity
Activity (RX, TX)
Tri-color Dual-LED Mode
In tri-color dual-LED mode, the link and activity status are indicated by the LED2 pin for 1000Base-T; by the LED1 pin for
100Base-TX; and by both LED2 and LED1 pins, working in conjunction, for 10Base-T. This is summarized in Table 10.
Table 10. Tri-color Dual-LED Mode – Pin Definition
LED Pin
(State)
LED Pin
(Definition)
LED2
LED1
LED2
LED1
Link/Activity
H
H
OFF
OFF
Link off
L
H
ON
OFF
1000 Link / No activity
Toggle
H
Blinking
OFF
1000 Link / Activity (RX, TX)
H
L
OFF
ON
100 Link / No activity
H
Toggle
OFF
Blinking
100 Link / Activity (RX, TX)
L
L
ON
ON
10 Link / No activity
Toggle
Toggle
Blinking
Blinking
10 Link / Activity (RX, TX)
Each LED output pin can directly drive an LED with a series resistor (typically 220to 470).
May 14, 2015
29
Revision 2.2

Share Link: 

datasheetq.com  [ Privacy Policy ]Request Datasheet ] [ Contact Us ]