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ACE24C512C 데이터시트(PDF) 9 Page - ACE Technology Co., LTD. |
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ACE24C512C 데이터시트(HTML) 9 Page - ACE Technology Co., LTD. |
9 / 18 page ACE24C512C Two-wire serial EEPROM VER 1.1 9 Instructions Write Operations (A) Byte Write A write operation requires two 8-bit data word address (A14/A0) following the device address word and acknowledgment. Upon receipt of this address, the ACE24C512C will again respond with a “0” and then clock in the first 8-bit data word. Following receipt of the 8-bit data word, the ACE24C512C will output a “0” and the addressing device, such as a microcontroller, must terminate the write sequence with a stop condition. And then the ACE24C512C enters an internally timed write cycle, all inputs are disabled during this write cycle and the ACE24C512C will not respond until the write is complete (see Figure 8). Notes: x means don’t care. (B) Page Write A page write is initiated the same as a byte write, but the master does not send a stop condition after the first data word is clocked in. Instead, after the ACE24C512C acknowledges receipt of the first data word, the master can transmit more data words. The ACE24C512C will respond with a “0” after each data word received. The microcontroller must terminate the page write sequence with a stop condition. The lower seven bits of the data word address are internally incremented following the receipt of each data word. The higher data word address bits are not incremented, retaining the memory page row location. When the word address, internally generated, reaches the page boundary, the following byte is placed at the beginning of the same page. If more than 128 data words are transmitted to the ACE24C512C, the data word address will roll-over and previous data will be overwritten. The address roll-over during write is from the last byte of the current page to the first byte of the same page. Figure8:Byte Write Figure9:Page Write |
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