ICS1893 datasheet(110/152 Pages) ICST

110 / 152 page

ICS1893 Rev C 6/6/00

June, 2000

110

Chapter 9

Pin Diagram, Listings, and Descriptions

ICS1893 Data Sheet - Release

9.3.3

Configuration Pins

Table 9-4 lists the configuration pins.

Table 9-4.

Configuration Pins

Name

Number

Type

Pin Description

10/100SEL

Input or

Output

10Base-T / 100Base-TX Select.

The ‘Pin Type’for this pin depends on the setting for the HW/SW pin

(pin 23). When the HW/SW pin is set for:

• Hardware mode, this pin acts as an input. In this case, when the

signal on this pin is logic:

– Low, this pin selects 10Base-T operations.

– High, this pin selects 100Base-TX operations.

• Software mode, this pin acts as an output that indicates the current

status of this pin. In this case, when the signal on this pin is logic:

– Low, this pin indicates 10Base-T operations are selected.

– High, this pin indicates 100Base-TX operations are selected.

10TCSR

Input

10M Transmit Current Set Resistor.

• A resistor, connected between this pin and ground, is required to

establish the value of the transmit current used in 10Base-T mode.

• The value and tolerance of this resistor is specified in Section 10.3,

“Recommended Component Values”.

100TCSR

Input

100M Transmit Current Set Resistor.

• A resistor, connected between this pin and ground, is required to

establish the value of the transmit current used in 100Base-TX

mode.

• The value and tolerance of this resistor is specified in Section 10.3,

“Recommended Component Values”.

ANSEL

Input or

Output

Auto-Negotiation Select.

The ‘Pin Type’for this pin depends on the setting for the HW/SW pin

(pin 23). When the HW/SW pin is set for:

• Hardware mode, this pin acts as an input. In this case, when the

signal on this pin is logic:

– Low, this pin does not select Auto-Negotiation operations.

– High, this pin selects Auto-Negotiation operations.

• Software mode, this pin acts as an output that indicates the current

status of this pin. In this case, when the signal on this pin is logic:

– Low, this pin indicates that Auto-Negotiation is disabled.

– High, this pin indicates that Auto-Negotiation is enabled.

DPXSEL

Input or

Output

Half-Duplex / Full-Duplex Select.

The ‘Pin Type’for this pin depends on the setting for the HW/SW pin

(pin 23). When the HW/SW pin is set for:

• Hardware mode, this pin acts as an input. In this case, when the

signal on this pin is logic:

– Low, this pin selects half-duplex operations.

– High, this pin selects full-duplex operations.

• Software mode, this pin acts as an output that indicates the current

status of this pin. In this case, when the signal on this pin is logic:

– Low, this pin indicates that it is set for half-duplex operations.

– High, this pin indicates that it is set for full-duplex operations.

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