ICS1893 Datasheet, PDF (110/152 Pages) Integrated Circuit Systems – 3.3-V 10Base-T/100Base-TX Integrated PHYceiver™

ICS1893 Data Sheet - Release
Chapter 9 Pin Diagram, Listings, and Descriptions
9.3.3 Configuration Pins
Table 9-4 lists the configuration pins.
Table 9-4. Configuration Pins
Pin
Name
Pin
Pin
Number Type
Pin Description
10/100SEL
2
Input or 10Base-T / 100Base-TX Select.
Output 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
9
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
10
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
26 Input or Auto-Negotiation Select.
Output 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
24 Input or Half-Duplex / Full-Duplex Select.
Output 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.
ICS1893 Rev C 6/6/00
Copyright © 2000, Integrated Circuit Systems, Inc.
All rights reserved.
110
June, 2000