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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LAN9730 датащи(PDF) 18 Page - Microchip Technology |
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LAN9730 датащи(HTML) 18 Page - Microchip Technology |
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18 / 222 page  LAN9730/LAN9730i DS00001946A-page 18 2012-2015 Microchip Technology Inc. Note 2-1 Configuration strap values are latched on Power on Reset (POR) or External Chip Reset (nRESET). Configuration straps are identified by an underlined symbol name. Pins that function as configuration straps must be augmented with an external resistor when connected to a load. Refer to Section 4.14, "Configuration Straps" for additional information. TABLE 2-2: EEPROM PINS Num Pins Name Symbol Buffer Type Description 1 EEPROM Data In EEDI IS (PD) This pin is driven by the EEDO output of the external EEPROM. 1 EEPROM Data Out EEDO O8 (PU) This pin drives the EEDI input of the external EEPROM. Auto-MDIX Enable Con- figuration Strap AUTOMDIX_EN IS (PU) Determines the default Auto-MDIX setting. 0 = Auto-MDIX is disabled. 1 = Auto-MDIX is enabled. See Note 2-1 for more information on configura- tion straps. 1 EEPROM Chip Select EECS O8 This pin drives the chip select output of the exter- nal EEPROM. Note: The EECS output may tri-state briefly during power-up. Some EEPROM devices may be prone to false selection during this time. When an EEPROM is used, an external pull-down resistor is recommended on this signal to prevent false selection. Refer to your EEPROM manufacturer’s datasheet for additional information. 1 EEPROM Clock EECLK O8 (PD) This pin drives the EEPROM clock of the external EEPROM. Note: This pin must be pulled-up externally for proper operation. |
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