ICS1892YT IDT, Integrated Device Technology Inc, ICS1892YT Datasheet - Page 106

• Manufacturer Part Number: ICS1892YT
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of ICS1892YT

• Lead Free Status / RoHS Status: Not Compliant

9.2.3 Configuration Pins
ICS1892, Rev. D, 2/26/01
Table 9-5
Table 9-5. Configuration Pins
10/100SEL
10/LP
10TCSR
100TCSR
ANSEL
Name
ICS1892 Data Sheet
Pin
lists the configuration pins.
Number
Pin
28
64
2
3
4
Input or
Input or
© 2000-2001, Integrated Circuit Systems, Inc.
All rights reserved.
Output
Output
Type
Input
Input
Input
Pin
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:
10M Serial / Link Pulse (Stream Interface).
10M Transmit Current Set Resistor.
100M Transmit Current Set Resistor.
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 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.
For this pin to have any affect on the MAC/Repeater Interface:
– The 10/100SEL pin must be logic zero (that is, 10-MHz mode).
– The MII/SI pin must be logic one (that is, Stream Interface mode).
When both the 10/100 SEL and MII/SI pins are set as required,
then this 10/LP pin selects between the 10M Serial Interface and
the Link Pulse Interface for the MAC/Repeater Interface. When the
signal on this pin is logic:
– Low, this pin selects the 10M Serial Interface.
– High, this pin selects the Link Pulse Interface.
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
“Recommended Component
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
“Recommended Component
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.
106
Chapter 9 Pin Diagram, Listings, and Descriptions
Pin Description
Values”.
Values”.
February 26, 2001
Section 10.3,
Section 10.3,