How To Connect The Wp Write Protect Pin Of An Eeprom Techoverflow

How To Connect The WP (Write Protect) Pin Of An EEPROM? | TechOverflow

How To Connect The WP (Write Protect) Pin Of An EEPROM? | TechOverflow In case you want to enable write protection to avoid accidentally overwriting your data, you should connect the wp pin to a microcontroller or an external logic circuitry. So the solution would be to pull that pin high through a pullup resistor to 5v and connecting that to a pin on the arduino. when the arduino pulls the line low, the write protect is disabled and the eeprom can be written to.

How To Connect The WP (Write Protect) Pin Of An EEPROM? | TechOverflow

How To Connect The WP (Write Protect) Pin Of An EEPROM? | TechOverflow In this project, we interfaced to a microchip eeprom in random read/write mode. "random" write mode specifies that the memory locations accessed do not come in any sequential form. If the pin is left floating, the wp pin will be internally pulled down to gnd. however, due to capacitive coupling that may appear in customer applications, connecting the wp pin to a known state is recommended. when using a pull‑up resistor, using 10 kΩ or less is recommended. Doing some light reading on the wp pin, i've found typically the wp pin is pull high (such as with our internal 100k resistor) to protect the device from accidentally writing to it's memory array. So the selfboot state machine looks at the wp pin state when booting up. the open collector output is only activated and pulled low when the writeback function is triggered. then the dsp will pull down the wp pin on the eeprom and write the contents of the interface registers.

WP-Encryption Steps Checklist 060830 | PDF | Payment Card Industry Data Security Standard ...

WP-Encryption Steps Checklist 060830 | PDF | Payment Card Industry Data Security Standard ... Doing some light reading on the wp pin, i've found typically the wp pin is pull high (such as with our internal 100k resistor) to protect the device from accidentally writing to it's memory array. So the selfboot state machine looks at the wp pin state when booting up. the open collector output is only activated and pulled low when the writeback function is triggered. then the dsp will pull down the wp pin on the eeprom and write the contents of the interface registers. The hardware write protection is controlled with the wp pin and can be used to protect the entire array, whether or not the software write protection has been enabled. this allows the user to protect none, first half, or all of the array depending on the application. Here we use the two different mcu, first one is 8051 which store the data in eeprom and second is the arduino which read the data from eeprom but don't write any new data. The write protect pin allows normal read/write operations when connected to ground (gnd). when the write protect pin is connected to vcc, the write protection feature is enabled. The wrsr instruction also allows the user to enable or disable the write protect (wp) pin through the use of the write protect enable (wpen) bit. when the wpen bit is set to logic ‘ 0 ’, the ability to write the eeprom array is dictated by the values of the block write protect (bp1, bp0) bits.

How to connect pin on the WP series