August 2003

3

KS8721B/BT

KS8721B/BT

Micrel

Revision History

Revision

Date

Summary of Changes

1.0

2/29/02

Document Origination (Preliminary)

2.0

4/01/02

Update timing Spec from page 33 to page 37

Change Revision ID from 1000 to 1001

Add new control register bit, Control Register 0 Bit 0, to control transmit enable/disable

Add 8h register map on the table

Editorial Change on FXSD/FXEN pin34

Change on duplex pin38 0=half and 1=full duplex

Change on the 10BT MII transmit timing 1.0us to 2.5us and Tlat 2.5us to 4BT

Add the TEST description mode on pin26

2.1

1/31/03

Add part number ordering information & remove pinout diagram

Edited pin description on the IO cloumn

Change the company logo, disclaimer, & contact info

Editorial changes on Stapping option description

Change on Register0h bit0, 1=disable and 0=enable

Add remote fault register4h bit13.

Add normal operating condition table & Thermal data for SSOP48 table

Add Reset Timing table & Transformer Lists

Add 48 TQFP pinout diagram & RMII AC Charateristics

Add ordering info for 48 Pin TQFP package, KS8721B/BTI industrial temperature, KSY8721B/KSY8721BT

environmentally friendly part number

2.2

8/29/03

Change part number from KS8721B to KS8721B/BT.

Change ordering info. from “KSY” to “KSZ” for lead free.

Change pin name from RMII_LPBK to RMII_BTB

Convert to new format.