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SC23M28 Datasheet(PDF) 5 Page - Silan Microelectronics Joint-stock |
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SC23M28 Datasheet(HTML) 5 Page - Silan Microelectronics Joint-stock |
5 / 10 page SC23M28 HANGZHOU SILAN MICROELECTRONICS CO.,LTD REV:1.0 2006.07.21 Http: www.silan.com.cn Page 5 of 10 3. Instruction description 3.1 Erase/write operation 1) Erase or write with protect bit The write protect bit is active as long as you write the data, and this unit is only readable. 2) Erase or write without protect bit. Write the data but not set the protect bit, so this unit can still be erased and written. 3) Write protect bit with data comparison When the command is executed, it will compare the data and the content of the destination address unit, if the contents are the same, then write “0”to the corresponding address unit; if the contents are different, do nothing. The chip can execute 3 erase and write operation: Erase and write (Last 203 clock cycles) (Figure3); Only Write: used for some bits of 1 byte data change from “1”to “0”(Last 103 clock cycles)(Figure4); Only Erase: data is FF (Last 103 clock cycles) (Figure4). If error occurs when erase or write data, I/O port will change from high level to low level at the raising edge of the third clock cycle. (Figure5). Figure3 Erase and write time sequence Figure4 Only Erase or only Write time sequence |
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