1893BKLFT IDT, 1893BKLFT Datasheet - Page 29

• Manufacturer Part Number: 1893BKLFT
• Description: Ethernet ICs 3.3V 10/100 BASE TX INTEGRATED PHYCEIVER
• Manufacturer: IDT

Specifications of 1893BKLFT

• Rohs: yes
• Part # Aliases: ICS1893BKLFT

5.5 Status Interface
ICS1893BF, Rev. F, 5/13/10
The ICS1893BF provides five multi-function configuration pins that report the results of continual link
monitoring by providing signals that are intended for driving LEDs. (For the pin numbers, see Table 8.6.)
Table 5-3. Pins for Monitoring the Data Link
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
4. As outputs, the asserted state of a multi-function configuration pin is the inverse of the sense sampled
5. Adding 10KΩ resistors across the LEDs ensures the PHY address is fully defined during slow VDD
6. PHY address 00 tri-states the MII interface. (Do not select PHY address 00 unless you want the MII
P0AC
P1CL
P2LI
P3TD
P4RD
that is sampled when the ICS1893BF exits 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 ICS1893BF. LEDs may be placed in series with these resistors to provide a designated
status indicator as described in Table 5-3.
Caution:
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 this LED for the
asserted state, the output is driven high.
power-ramp conditions.
tri-stated.)
Pin
ICS1893BF Data Sheet Rev. F - Release
AC (Link Activity) LED
CL (Collisions) LED
LI (Link Integrity) LED
TD (Transmit Data) LED
RD (Receive Data) LED
LED Driven by the Pin’s Output Signal
All pins listed in Table 5-3 must not float.
Copyright © 2009, IDT, Inc.
All rights reserved.
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Chapter 5 Interface Overviews
May, 2010