H1102 View Datasheet(PDF) - Micrel

Part Name

Description

Manufacturer

H1102

10Base-T/100Base-TX Physical Layer Transceiver

Micrel 

Micrel, Inc.

KSZ8041NL/RNL

Pin Description – KSZ8041RNL (Continued)

Pin Number

31

Pin Name

LED1 /

SPEED

Type(1)

Ipu/O

Pin Function

LED Output: Programmable LED1 Output /

Config Mode:

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

Pin State

10BT

H

100BT

L

LED Definition

OFF

ON

LED mode = [01]

Activity

Pin State

No Activity

H

Activity

Toggle

LED Definition

OFF

Blinking

LED mode = [10], [11]

Reserved

32

PADDLE

RST#

GND

I

Chip Reset (active low)

Gnd

Ground

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

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