Corrections of Hardware Manual MB90550 hm90550a-cm44-10103-5e-corr-x1-00 © Fujitsu Microelectronics Europe GmbH Addendum, MB90550 Hardware Manual (CM44-10103-5E) This is the Addendum for the Hardware Manual CM44-10103-5E of the MB90550 microcontroller series. It describes all known discrepancies of the MB90550 microcontroller series Hardware Manual. Ref. Number Date (Internal ref. number) Version Chapter/Page No. (Text Link) dd.mm.yy HWM90550001 HWM90550002 12.05.04 1.00 26.09.05 1.01 19 hm90550a-cm44-10103-5e-corr-x1-00.doc 1 / 2 Description/Correction I²C Interface, Note added Short Name of register is ECSR HWM90550001 TOP CHAPTER 19 I2C INTERFACE Restriction of specification at sending General Call Address for MCU with I2C When using Multi-Master mode for I2C and another Master is sending a General Code Address at same time as Fujitsu MCU, an arbitration lost* occurs after 2nd byte. Under following conditions the restriction do not exist: - No usage of I2C peripheral - Usage of I2C with Single Master system - Usage of I2C with Multi Master system, no General Call Address used - Usage of I2C with Multi Master system, General Call Address used by Fujitsu MCU, only - Usage of I2C with Multi Master system, General Call Address used. If the value of data, send by Fujitsu MCU, is smaller than another transfer data, the arbitration lost does not occur. *: If the data value is smaller than another one, oneself never has "Arbitration lost" because one with large transmission data value will have "Arbitration lost". HWM90550002 TOP The short name of the bus control signal selection register is ECSR. The hardware manual uses sometimes EPCR instead of ECSR. hm90550a-cm44-10103-5e-corr-x1-00.doc 2 / 2