KSZ9021GN View Datasheet(PDF) - Micrel
Part Name
Description
Manufacturer
KSZ9021GN Datasheet PDF : 53 Pages
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Micrel, Inc.
Pin Number
12
13
14
Pin Name
AVDDL
AVDDL
TXRXP_D
15
TXRXM_D
16
AVDDH
17
LED2 /
PHYAD1
18
DVDDH
19
LED1 /
PHYAD0
KSZ9021GN
Type(1)
P
P
I/O
I/O
P
I/O
Pin Function
1.2V analog VDD
1.2V analog VDD
Media Dependent Interface[3], positive signal of differential pair
1000Base-T Mode:
TXRXP_D corresponds to BI_DD+ for MDI configuration and BI_DC+ for
MDI-X configuration, respectively.
10Base-T / 100Base-TX Mode:
TXRXP_D is not used.
Media Dependent Interface[3], negative signal of differential pair
1000Base-T Mode:
TXRXM_D corresponds to BI_DD- for MDI configuration and BI_DC- for
MDI-X configuration, respectively.
10Base-T / 100Base-TX Mode:
TXRXM_D is not used.
3.3V analog VDD
LED Output: Programmable LED2 Output /
Config Mode: The pull-up/pull-down value is latched as PHYAD[1] during
power-up / reset. See “Strapping Options” section for details.
The LED2 pin is programmed by the LED_MODE strapping option (pin 55, and is
defined as follows.
Single LED Mode
Link
Link off
Link on (any speed)
Pin State
H
L
LED Definition
OFF
ON
Tri-color Dual LED Mode
Link / Activity
Link off
1000 Link / No Activity
1000 Link / Activity (RX, TX)
100 Link / No Activity
100 Link / Activity (RX, TX)
10 Link / No Activity
10 Link / Activity (RX, TX)
Pin State
LED2 LED1
H
H
L
H
Toggle H
H
L
H
Toggle
L
L
Toggle Toggle
LED Definition
LED2 LED1
OFF
OFF
ON
OFF
Blinking OFF
OFF
ON
OFF
Blinking
ON
ON
Blinking Blinking
For Tri-color Dual LED Mode, LED2 works in conjunction with LED1 (pin 19 to
indicate 10 Mbps Link and Activity.
P
3.3V or 2.5V digital VDD
I/O LED Output: Programmable LED1 Output /
Config Mode: The pull-up/pull-down value is latched as PHYAD[0] during
power-up / reset. See “Strapping Options” section for details.
The LED1 pin is programmed by the LED_MODE strapping option (pin 55, and is
defined as follows.
September 2010
10
M9999-091010-1.1
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