ics1893cy-10 Integrated Device Technology, ics1893cy-10 Datasheet - Page 20

• Manufacturer Part Number: ics1893cy-10
• Description: 3.3-v 10base-t/100base-tx Integrated Phyceiver
• Manufacturer: Integrated Device Technology

4.3 Automatic Power-Saving Operations
4.4 Auto-Negotiation Operations
ICS1893CY-10 Rev 1/07
The ICS1893CY-10 has power-saving features that automatically minimize its total power consumption
while it is operating.
modes.
Table 4-1. Automatic Power-Saving Features, 10Base-T and 100Base-TX Modes
The ICS1893CY-10 has an Auto-Negotiation sublayer and provides both an input pin, ANSEL
(Auto-Negotiation Select) and a Control Register bit (bit 0.12) to determine whether its Auto-Negotiation
sublayer is enabled or disabled. The ICS1893CY-10 HW/SW input pin exclusively selects whether the
ANSEL pin (which is used for the hardware mode) or Control Register bit 0.12 (which is used for the
software mode) controls its Auto-Negotiation sublayer.
When enabled, the ICS1893CY-10 Auto-Negotiation sublayer exchanges technology capability data with its
remote link partner and automatically selects the highest-performance operating mode it has in common
with its remote link partner. For example, if the ICS1893CY-10 supports 100Base-TX and 10Base-T modes
– but its link partner supports 100Base-TX and 100Base-T4 modes – the two devices automatically select
100Base-TX as the highest-performance common operating mode. For details regarding initialization and
control of the auto-negotiation process, see
Disable Inter-
nal Modules
STA Control
of Automatic
Power-
Saving
Features
Feature
Power-
Saving
ICS1893CY-10 Data Sheet - Release
In 10Base-T mode, the ICS1893CY-10
disables all its internal 100Base-TX
modules.
When an STA sets the state of the
ICS1893CY-10 Extended Control Register
2, bit 19.0 to logic:
•
•
Zero, the 100Base-TX modules always
remain enabled, even during 10Base-T
operations.
One, the ICS1893CY-10 automatically
disables 100Base-TX modules while the
ICS1893CY-10 is operating in 10Base-T
mode.
Table 4-1
Copyright © 2007, Integrated Device Technology, Inc.
10Base-T Mode
lists the ICS1893CY-10 automatic power-saving features for the various
All rights reserved.
Section 6.2, “Functional Block:
20
Mode for ICS1893CY-10
In 100Base-TX mode, the ICS1893CY-10
disables all its internal 10Base-T modules.
When an STA sets the state of the
ICS1893CY-10 Extended Control Register
2, bit 19.1 to logic:
•
•
Zero, the 10Base-T modules always
remain enabled, even during
100Base-TX operations.
One, the ICS1893CY-10 automatically
disables 10Base-T modules while the
ICS1893CY-10 is operating in
100Base-TX mode.
Chapter 4 Operating Modes Overview
100Base-TX Mode
Auto-Negotiation”.