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CAT5269 Datasheet(PDF) 8 Page - ON Semiconductor |
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CAT5269 Datasheet(HTML) 8 Page - ON Semiconductor |
8 / 15 page CAT5269 http://onsemi.com 8 WRITE PROTECTION The Write Protection feature allows the user to protect against inadvertent programming of the non-volatile data registers. If the WP pin is tied to LOW, the data registers are protected and become read only. Similarly, the WP pin going low after start will interrupt a nonvolatile write to data registers, while the WP pin going low after an internal write cycle has stated will have no effect on any write operation (see also CAT5409 or CAT5259). The CAT5269 will accept both slave addresses and instructions, but the data registers are protected from programming by the device’s failure to send an acknowledge after data is received. STOP CONDITION START CONDITION ADDRESS ACK 8TH BIT BYTE n SCL SDA Figure 3. Write Cycle Timing tWR Figure 4. Start/Stop Condition START CONDITION SDA STOP CONDITION SCL Figure 5. Acknowledge Condition ACKNOWLEDGE 1 START SCL FROM MASTER 89 DATA OUTPUT FROM TRANSMITTER DATA OUTPUT FROM RECEIVER Figure 6. Slave Address Bits 0 1 0 1 A3 A2 A1 A0 CAT5269 * A0, A1, A2 and A3 correspond to pin A0, A1, A2 and A3 of the device. ** A0, A1, A2 and A3 must compare to its corresponding hard wired input pins. |
Similar Part No. - CAT5269_13 |
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Similar Description - CAT5269_13 |
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