AN2197 Datasheet, PDF (1/13 Pages) STMicroelectronics – Guidelines for migrating

AN2197
APPLICATION NOTE
Guidelines for migrating ST72F324 & ST72F321
applications to ST72F324B, ST72F321B or ST72F325
Introduction
This application note provides information on using ST72F321B, ST72F324B and ST72F325
microcontroller devices in applications originally designed for the ST72F324 and ST72F321 series.
Table 1. Migration cross-reference table
FROM
TO
Description
ST72F324
ST72F321
ST72F324B
ST72F325
ST72F321B
ST72F325
8K to 32K Flash, 32-pin and 44-pin
16K to 32K Flash, 32-pin and 44-pin
with I²C, Auto Reload Timer and Clock Security System
32K to 60K Flash, 44-pin and 64-pin,
with I²C, Auto Reload Timer
32K to 60K Flash, 44-pin and 64-pin
with I²C, Auto Reload Timer and Clock Security System
Note: Use ST72F325 if your application requires CSS (Clock Security System).
October 2005
Rev 1
1/13
www.st.com
13