VT6103 datasheet(11/46 Pages) VIA

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VT6103 - Fast Ethernet 10 / 100 PHY / Transceiver

Revision 1.1, April 15, 2002

-5-

Pin Descriptions

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Strap Options

Signal Name

Pin #

I/O

Signal Description

SYMB /COL

Symbol Mode. Latched into register 16 (register 10h) bit-2 at power-up /

reset. Internally pulled low for default disabled.

RPTR / CRS

Repeater Mode. Latched into register 16 (register 10h) bit-4 at power-up /

reset. Internally pulled low for default disabled.

ISO /RXER

Isolate. Latched into register 0 bit-10 at power-up / reset. Internally pulled

low for default disabled.

PHYAD[4:0] / RXD[0:3], INT#

6, 5, 4,

3, 25

PHY Address. Latched into register 16 (register 10h) bits 15-11 at power-up

/ reset. Internally pulled low, low, low, low, and high for default 00001b.

LINK / LED0

Test Mode Enable. 0=Enable, 1=Disable. Do not leave floating. Pull high

with 10K ohms if not used.

SPD100 / LED1

Speed Select. Latched into register 0 bit-13 at power-up / reset (0=Speed 10,

1=Speed100). If NWAYEN is not pulled down at power-up / reset, this pin

is also latched as Speed support in register 4 (Auto-Negotiation

Advertisement Base Page). Do not leave floating. Pull high or low with 10K

ohms.

DUPLEX / LED2

Duplex Mode Select.

Latched into register 0 bit-8 at power-up / reset

(0=Half, 1=Full). If NWAYEN is not pulled down at power-up / reset, this

pin is also latched as Duplex support in register 4 (Auto-Negotiation

Advertisement Base Page). Do not leave floating. Pull high or low with 10K

ohms.

NWAYEN / LED3

N-Way Enable. Latched into register 0 bit-12 (Auto-Negotiation Enable) at

power-up / reset (0=Disable, 1=Enable). Do not leave floating. Pull low with

10K ohms if not used.

FXEN /SD

Fiber Mode Enable. Latched into register 16 (register 10h) bit-10 at power-

up / reset (0=Disable, 1=Enable). Do not leave floating. Pull low with 10K

ohms if not used.

Note:

For the pins listed above, pullup / pulldown status is latched during powerup / reset. External strap option values may be

set by connecting the indicated pin to a 10K ohm pull down for 0 (L) or to a 10K pull up for 1 (H).

LED Outputs

Signal Name

Pin #

I/O

Signal Description

LED0 /LINK

LED Output 0. See Register 16 (10h) bits 5-6 & Table 6 for LED function.

LED1 / SPD100

LED Output 1. See Register 16 (10h) bits 5-6 & Table 6 for LED function.

LED2 / DUPLEX

LED Output 2. See Register 16 (10h) bits 5-6 & Table 6 for LED function.

LED3 / NWAYEN

LED Output 3. See Register 16 (10h) bits 5-6 & Table 6 for LED function.

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