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X76F102P Datasheet(PDF) 4 Page - IC MICROSYSTEMS |
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X76F102P Datasheet(HTML) 4 Page - IC MICROSYSTEMS |
4 / 18 page X76F102 4 Figure 2. Data Validity Figure 3. Definition of Start and Stop Conditions Table 1. X76F102 Instruction Set Illegal command codes will be disregarded. The part will respond with a “no-ACK” to the illegal byte and then return to the standby mode. All write/read operations require a password. Command after Start Command Description Password used 1 0 0 S3 S2 S1 S00 Sector Write Write 1 0 0 S3 S2 S1 S0 1 Sector Read Read 1 1 1 1 1 1 0 0 Change Write Password Write 1 1 1 1 1 1 1 0 Change Read Password Write 0 1 0 1 0 1 0 1 Password ACK Command None SCL SDA Data Stable Data Change SCL SDA Start Condition Stop Condition PROGRAM OPERATIONS Sector Write The sector write mode requires issuing the 8-bit write command followed by the password and then the data bytes transferred as illustrated in figure 4. The write com- mand byte contains the address of the sector to be writ- ten. Data is written starting at the first address of a sector and eight bytes must be transferred. After the last byte to be transferred is acknowledged a stop condition is issued which starts the nonvolatile write cycle. If more or less than 8 bytes are transferred, the data in the sector remains unchanged. ACK Polling Once a stop condition is issued to indicate the end of the host’s write sequence, the X76F102 initiates the internal nonvolatile write cycle. In order to take advantage of the typical 5ms write cycle, ACK polling can begin immedi- ately. This involves issuing the start condition followed by |
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