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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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LAN9117 데이터시트(HTML) 27 Page - Microchip Technology |
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LAN9117 데이터시트(HTML) 27 Page - Microchip Technology |
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2005-2016 Microchip Technology Inc. DS00002267A-page 27 LAN9117 EWDS (Erase/Write Disable): After issued, the EEPROM will ignore erase and write commands. To re-enable erase/write operations issue the EWEN command. EWEN (Erase/Write Enable): Enables the EEPROM for erase and write operations. The EEPROM will allow erase and write operations until the “Erase/Write Disable” command is sent, or until power is cycled. FIGURE 3-6: EEPROM EWDS CYCLE Note: The EEPROM device will power-up in the erase/write-disabled state. Any erase or write operations will fail until an Erase/Write Enable command is issued. FIGURE 3-7: EEPROM EWEN CYCLE 0 EECLK EEDIO (INPUT) EEDIO (OUTPUT) EECS 10 00 t CSL 0 EECLK EEDIO (INPUT) EEDIO (OUTPUT) EECS 10 11 t CSL |
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