ksz8021rnli Micrel Semiconductor, ksz8021rnli Datasheet - Page 10

• Manufacturer Part Number: ksz8021rnli
• Description: 10base-t/100base-tx Phy With Rmii Support
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
Pin Description – KSZ8021RNL / KSZ8031RNL (Continued)
Notes:
1.
2.
3.
August 2010
Pin Number
PADDLE
P = Power supply.
Gnd = Ground.
I = Input.
O = Output.
I/O = Bi-directional.
Ipu/O = Input with internal pull-up (see Electrical Characteristics for value) during power-up/reset; output pin otherwise.
Ipd/O = Input with internal pull-down (see Electrical Characteristics for value) during power-up/reset; output pin otherwise.
Ipu/Opu = Input with internal pull-up (see Electrical Characteristics for value) during power-up/reset; output pin with internal pull-up (see Electrical
Characteristics for value) otherwise.
RMII Rx Mode: The RXD[1:0] bits are synchronous with the 50MHz RMII Reference Clock. For each clock period in which CRS_DV is asserted,
two bits of recovered data are sent by the PHY to the MAC.
RMII Tx Mode: The TXD[1:0] bits are synchronous with the 50MHz RMII Reference Clock . For each clock period in which TXEN is asserted, two
bits of data are received by the PHY from the MAC.
19
20
21
22
23
24
ANEN_SPEED
Pin Name
LED0 /
TXEN
TXD0
TXD1
RST#
GND
GND
Type
Ipu/O
Gnd
Gnd
I/O
I
I
I
(1)
Pin Function
RMII Transmit Enable Input
RMII Transmit Data Input[0]
RMII Transmit Data Input[1]
NAND Tree Mode:
Ground
LED Output:
Config Mode:
The LED0 pin is programmable via register 1Fh bits [5:4], and is defined as follows.
LED mode = [10], [11]
Chip Reset (active low)
Ground
LED mode = [00]
Link/Activity
No Link
Link
Activity
LED mode = [01]
Link
No Link
Link
Latched as Auto-Negotiation Enable (register 0h, bit [12]) and
SPEED (register 0h, bit [13]) at the de-assertion of reset. See
“Strapping Options” section for details.
Programmable LED0 Output /
Pin State
High
Low
Toggle
Pin State
High
Low
10
NAND Tree output pin
(3)
(3)
Reserved
LED Definition
OFF
ON
Blinking
LED Definition
OFF
ON
KSZ8021RNL / KSZ8031RNL
M9999-082710-1.0