ICS1893Y-10T IDT, Integrated Device Technology Inc, ICS1893Y-10T Datasheet - Page 22
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ICS1893Y-10T
Manufacturer Part Number
ICS1893Y-10T
Description
PHYCEIVER LOW PWR 3.3V 64-TQFP
Manufacturer
IDT, Integrated Device Technology Inc
Series
PHYceiver™r
Type
PHY Transceiverr
Datasheet
1.ICS1893Y-10.pdf
(150 pages)
Specifications of ICS1893Y-10T
Protocol
MII
Voltage - Supply
3.14 V ~ 3.47 V
Mounting Type
Surface Mount
Package / Case
64-TQFP, 64-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Number Of Drivers/receivers
-
Other names
1893Y-10T
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ICS1893Y-10T
Manufacturer:
IDT, Integrated Device Technology Inc
Quantity:
10 000
4.1.2.3 Software Reset
4.2 Power-Down Operations
ICS1893Y-10 Rev F 1/20/04
Entering Software Reset
Initiation of a software reset occurs when a management entity writes a logic one to Control Register bit
0.15. When this write occurs, the ICS1893Y-10 enters the reset state for two REF_IN clock cycles.
Note:
Exiting Software Reset
At the completion of a reset (either hardware, power-on, or software), the ICS1893Y-10 sets all registers to
their default values. This action automatically clears (that is, sets equal to logic zero) Control Register bit
0.15, the software reset bit. Therefore, for a software reset (only), bit 0.15 is a self-clearing bit that indicates
the completion of the reset process.
Note:
1. The RESETn pin is active low but Control Register bit 0.15 is active high.
2. Exiting a software reset is nearly identical to exiting a hardware reset or a power-on reset, except that
3. The Control Register bit 0.15 does not represent the status of a hardware reset. It is a self-clearing bit
The ICS1893Y-10 enters the power-down state whenever either (1) the RESETn pin is low or (2) Control
Register bit 0.11 (the Power-Down bit) is logic one. In the power-down state, the ICS1893Y-10 disables all
internal functions and drives all MAC/Repeater Interface output pins to logic zero except for those that
support the MII Serial Management Port. In addition, the ICS1893Y-10 tri-states its Twisted-Pair Transmit
pins (TP_TXP and TP_TXN) to achieve an additional reduction in power.
There is one significant difference between entering the power-down state by setting Control Register bit
0.11 as opposed to entering the power-down state during a reset. When the ICS1893Y-10 enters the
power-down state:
•
•
For more information on power-down operations, see the following:
•
•
By setting Control Register bit 0.11, the ICS1893Y-10 maintains the value of all Management Register
bits except for the latching low (LL), latching high (LH), and latching maximum (LMX) status bits. Instead,
these LL, LH, and LMX Management Register bits are re-initialized to their default values.
During a reset, the ICS1893Y-10 sets all of its Management Register bits to their default values. It does
not maintain the state of any Management Register bit.
Section 7.14, “Register 19: Extended Control Register 2”
Section 9.4, “DC Operating
consumption while in the power-down state
upon exiting a software-initiated reset, the ICS1893Y-10 does not re-latch its Serial Management Port
Address into the Extended Control Register. [For information on the Serial Management Port Address,
see
that is used to initiate a software reset. During a hardware or power-on reset, Control Register bit 0.15
does not get set to logic one. As a result, this bit 0.15 cannot be used to indicate the completion of the
reset process for hardware or power-on resets.
ICS1893Y-10 Data Sheet - Release
Entering a software reset is nearly identical to entering a hardware reset or a power-on reset,
except that during a software-initiated reset, the ICS1893Y-10 does not enter the power-down
state.
Section 7.11.3, “PHY Address (bits
Copyright © 2004, Integrated Circuit Systems, Inc.
Characteristics”, which has tables that specify the ICS1893Y-10 power
All rights reserved.
16.10:6)”.]
22
Chapter 4 Operating Modes Overview
January, 2004