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CAT1163WI-30-GT2 Datasheet(PDF) 6 Page - Catalyst Semiconductor |
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CAT1163WI-30-GT2 Datasheet(HTML) 6 Page - Catalyst Semiconductor |
6 / 14 page CAT1163 © 2007 Catalyst Semiconductor, Inc. 6 Doc. No. 3003 Rev. E Characteristics subject to change without notice Hardware Data Protection The CAT1163 is designed with the following hardware data protection features to provide a high degree of data integrity. (1) The CAT1163 features a WP pin. When the 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. Any attempt to access the internal EEPROM is not recognized and an ACK will not be sent on the SDA line when RESET or RESET ¯¯¯¯¯¯ is active. Reset Threshold Voltage The CAT1163 is offered with five reset threshold voltage ranges. They are 4.50 ÷ 4.75V, 4.25 ÷ 4.50V, 3.00 ÷ 3.15V, 2.85 ÷ 3.00V and 2.55 ÷ 2.70V. Figure 2. Bus Timing Figure 3. Write Cycle Timing 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 tWR STOP CONDITION START CONDITION ADDRESS ACK 8TH BIT BYTE n SCL SDA START BIT SDA STOP BIT SCL |
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