Micrel, Inc.
KSZ8041NL/RNL
Pin Description – KSZ8041RNL (Continued)
Type(1)
Pin Number Pin Name
Pin Function
31
LED1 /
Ipu/O
LED Output:
Config Mode:
Programmable LED1 Output /
SPEED
Latched as SPEED (register 0h, bit 13) during power-up / reset.
See “Strapping Options” section for details.
The LED1 pin is programmable via register 1Eh bits [15:14], and is defined as
follows.
LED mode = [00]
Speed
10BT
Pin State
LED Definition
H
L
OFF
ON
100BT
LED mode = [01]
Activity
Pin State
H
LED Definition
OFF
No Activity
Activity
Toggle
Blinking
LED mode = [10], [11]
Reserved
32
RST#
GND
I
Chip Reset (active low)
Ground
PADDLE
Gnd
Notes:
1. P = Power supply.
Gnd = Ground.
I = Input.
O = Output.
I/O = Bi-directional.
Opu = Output with internal pull-up (40K +/-30%).
Ipu/O = Input with internal pull-up (40K +/-30%) during power-up/reset; output pin otherwise.
Ipd/O = Input with internal pull-down (40K +/-30%) during power-up/reset; output pin otherwise.
2. RMII Rx Mode: The RXD[1:0] bits are synchronous with REF_CLK. For each clock period in which CRS_DV is asserted, two bits of
recovered data are sent from the PHY.
3. RMII Tx Mode: The TXD[1:0] bits are synchronous with REF_CLK. For each clock period in which TX_EN is asserted, two bits of data are
received by the PHY from the MAC.
September 2010
18
M9999-090910-1.4