1892YLF IDT, Integrated Device Technology Inc, 1892YLF Datasheet - Page 105

• Manufacturer Part Number: 1892YLF
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 1892YLF

• Lead Free Status / RoHS Status: Compliant

9.2.2 Multi-Function (Multiplexed) Pins: PHY Address and LED Pins
ICS1892, Rev. D, 2/26/01
Table 9-4
Note:
1. During either a power-on reset or a hardware reset, each multi-function configuration pin is an input
2. A software reset does not affect the state of a multi-function configuration pin. During a software reset,
3. Each multi-function configuration pin must be pulled either up or down with a resistor to establish the
Caution:
4. As outputs, the asserted state of a multi-function configuration pin is the inverse of the sense sampled
Caution:
Note:
Table 9-4. PHY Address and LED Pins
P0AC,
P1CL,
P2LI,
P3TD,
P4RD
Name
Pin
ICS1892
that is sampled when the ICS1892 exists the reset state. After sampling is complete, these pins are
output pins that can drive status LEDs.
all multi-function configuration pins are outputs.
address of the ICS1892. LEDs placed in series with these resistors provide a designated status
indicator.
during reset. This inversion provides a signal that can illuminate an LED during an asserted state. For
example, if a multi-function configuration pin is pulled down to ground through an LED and a
current-limiting resistor, then the sampled sense of the input is low. To illuminate an LED for the
asserted state requires the output to be high.
Each of these pins monitor the data link by providing signals that directly drive LEDs.
lists the pins for the multifunction group of pins (that is, the multiplexed PHY Address / LED pins).
Number
All pins listed inTable 9.4 must not float.
PHY Address 00 will tri-state the MII interface.
Pin
58,
59,
60,
61,
62
Input or
Output
Type
Pin
© 2000-2001, Integrated Circuit Systems, Inc.
All rights reserved.
PHY (Address Bit) 0 / Activity LED.
PHY (Address Bit) 1 / Collision LED.
PHY (Address Bit) 2 / Link Integrity LED.
PHY (Address Bit) 3 / Transmit Data LED.
PHY (Address Bit) 4 / Receive Data LED.
The ‘Pin Type’ for these multiplexed pins depends on the where the
ICS1892 is in its reset cycle.
For more information, see
•
•
During a reset of the ICS1892, these pins act as inputs.
After a reset of the ICS1892, these pins latch the state of the inputs into
their respective PHY Address bits. (See
converts the pin signal to an output that can drive the respective LED
directly.
105
Section 6.9, “Status
Chapter 9 Pin Diagram, Listings, and Descriptions
Pin Description
Table
Interface”.
8-16.) The ICS1892 then
February 26, 2001