ICS1893BY-10 Data Sheet - Release
Chapter 8 Pin Diagram, Listings, and Descriptions
8.3.3 Configuration Pins
Table 8-4 lists the configuration pins.
Table 8-4. Configuration Pins
Pin
Pin
Pin
Pin Description
Name
Number
Type
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.
AMDIX_E
N
3
Input
Input
Auto-MDIX Enable (built-in internal 50K Ohm pull-up)
10TCSR
13
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 9.3,
“Recommended Component Values”.
100TCSR
14
26
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 9.3,
“Recommended Component Values”.
ANSEL
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.
ICS1893BY-10 Rev A 3/24/04
March, 2004
Copyright © 2004, Integrated Circuit Systems, Inc.
All rights reserved.
104
ICSI [ INTEGRATED CIRCUIT SOLUTION INC ]
