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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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EPC635 датащи(PDF) 70 Page - Espros Photonics corp |
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EPC635 датащи(HTML) 70 Page - Espros Photonics corp |
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70 / 97 page  Each time a single or multiple I2C byte-write command sequence is applied to the EEPROM address space, a charge-pump for program and erase operations is automatically enabled before the EEPROM write access starts. It is disabled after the write access is finished. The application software must respect a 20ms/byte write time (program/erase cycle) when altering the EEPROM content through I2C inter- face. When i2c_clock_stretch_en = 1, the I2C slave interface will stretch the SCK line while the EEPROM write continues. The application CPU can monitor the SCK line with its I2C master interface before sending the next byte-write command. If the application CPU does not support the I2C clock stretching feature, the application should first set i2c_clock_stretch_en = 0 and keep a timer for waiting 20ms be- tween every I2C byte-write command sequence. IMPORTANT: ■ The built-in charge-pump for the EEPROM is a noisy circuit which shall not be enabled during frame acquisition. It can degrade the per- formance of the measurements. Therefore, the application must not alter the content of the EEPROM while a frame acquisition is going on. ■ The number of WRITE cycles into the EEPROM is limited. It should not exceed 100 WRITE operations. © 2017 ESPROS Photonics Corporation Characteristics subject to change without notice 70 / 97 Datasheet_epc635-V1.02 www.espros.com |
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