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AT89C51AC3-RDTIM 数据表(PDF) 37 Page - ATMEL Corporation |
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AT89C51AC3-RDTIM 数据表(HTML) 37 Page - ATMEL Corporation |
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37 / 141 page  37 AT89C51AC3 4383A–8051–10/04 Registers Table 11. EECON Register EECON (S:0D2h) EEPROM Control Register Reset Value = XXXX XX00b Not bit addressable 7654 3210 EEPL3 EEPL2 EEPL1 EEPL0 - - EEE EEBUSY Bit Number Bit Mnemonic Description 7-4 EEPL3-0 Programming Launch command bits Write 5Xh followed by AXh to EEPL to launch the programming. 3- Reserved The value read from this bit is indeterminate. Do not set this bit. 2- Reserved The value read from this bit is indeterminate. Do not set this bit. 1EEE Enable EEPROM Space bit Set to map the EEPROM space during MOVX instructions (Write in the column latches) Clear to map the XRAM space during MOVX. 0EEBUSY Programming Busy flag Set by hardware when programming is in progress. Cleared by hardware when programming is done. Can not be set or cleared by software. |
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