KSZ9021RNI Datasheet, PDF (17/56 Pages) Micrel Semiconductor – Gigabit Ethernet Transceiver with RGMII Support

Micrel, Inc.
KSZ9021RL/RN
Pin Number
10
Pin Name
TXRXP_D
11
TXRXM_D
12
AVDDH
13
VSS_PS
14
DVDDL
15
LED2 /
PHYAD1
Type⁽¹⁾
I/O
I/O
P
Gnd
P
I/O
Pin Function
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 V_DD
Digital ground
1.2V digital V_DD
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 41), 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 17) to
indicate 10 Mbps Link and Activity.
16
DVDDH
October 2009
P
3.3V / 2.5V digital V_DD
17
M9999-101309-1.1