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CAT24C083PI-28TE13 Arkusz danych(PDF) 6 Page - Catalyst Semiconductor |
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CAT24C083PI-28TE13 Arkusz danych(HTML) 6 Page - Catalyst Semiconductor |
6 / 12 page CAT24C163/083/043/023 6 Advanced Doc. No. 25080-00 3/98 M-1 Hardware Data Protection The 24CXXX is designed with the following hardware data protection features to provide a high degree of data integrity. (1) The 24CXXX features a WP pin. When WP pin is tied high the entire memory array becomes write protected (read only). (2) The VCC sense provides write protection when VCC falls below the reset threshold value (VTH). The VCC lock out inhibits writes to the serial EEPROM whenever VCC falls below (power down) VTH or until VCC reaches the reset threshold (power up) VTH. Reset Threshold Voltage From the factory the 24CXXX is offered in five different variations of reset threshold voltages. They are 4.50- 4.75V, 4.25-4.50V, 3.00-3.15V, 2.85-3.00V and 2.55- 2.70V. To provide added flexibility to design engineers using this product, the 24CXXX is designed with an additional feature of programming the reset threshold voltage. This allows the user to change the existing reset threshold voltage to one of the other four reset threshold voltages. Once the reset threshold voltage is selected it will not change even after cycling the power, unless the user uses the programmer to change the reset threshold voltage. However, the programming function is available only through third party programmer manufacturers. Please call Catalyst for a list of program- mer manufacturers who support this function. tWR STOP CONDITION START CONDITION ADDRESS ACK 8TH BIT BYTE n SCL SDA Figure 3. Write Cycle Timing START BIT SDA STOP BIT SCL Figure 4. Start/Stop Timing tHIGH SCL SDA IN SDA OUT tLOW tF tLOW tR tBUF tSU:STO tSU:DAT tHD:DAT tHD:STA tSU:STA tAA tDH Figure 2. Bus Timing |
Podobny numer części - CAT24C083PI-28TE13 |
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Podobny opis - CAT24C083PI-28TE13 |
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