ATF280F_14 datasheet(28/107 Pages) ATMEL

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ATF280F [DATASHEET]

7750E

−AERO−05/12

• IO713_D0: this signal takes the value ouput by the EEPROM (first bit of the EEPROM),

• CON: this signal is driven to a low logic level,

• IO303_INIT: this signal is internally pulled-up,

• IO259_LDC: the Low During Configuration is driven to a low logic level,

• IO265_HDC: the High During Configuration is driven to a high logic level,

• RESETN: this signal is an input which immediately reset the configuration logic to a Manual Reset lifephase.

[Configuration Download]: During the Configuration Download lifephase, the ATF280F continues to drive the signal

regarding configuration download interfaces, this lifephase starts when CCLK pin is ouput:

• M0, M1, M2: these signals remain inputs and are not used anymore,

• CCLK: this signal is output as clock source for the serial EEPROM memory. At each rising edge of CCLK, the

EEPROM memory outputs a new bit while the ATF280F senses the previous bit. By default, the CCLK

frequency toggles at a frequency of approximatively 900 KHz.

• IO713_D0: this signal is sampled by the FPGA at each rising edge of CCLK. It is the DATA ouput of the

EEPROM memory,

• CON: this signal is driven to a low logic level,

• IO303_INIT: this signal is internally pulled-up and is used as an error monitoring pin. Refer to Data Link

Protection

section for serial configuration,

• IO259_LDC: the Low During Configuration is driven to a low logic level,

• IO265_HDC: the High During Configuration is driven to a high logic level,

• RESETN: this signal is an input which immediately reset the configuration logic to a Manual Reset lifephase.

[Run]: Once configured, the ATF280F enters in Run lifephase. In this lifephase, the loaded application runs and its own

lifephases are taken into account. This lifephase is entered few CCLK cycles after the ATF280F has sensed the

postamble, it then releases the configuration interface signals and all multiplexed signals are set to their GPIO function:

• M0, M1, M2: these signals remain inputs and are not used anymore,

• CCLK: this signal is an input with pull-up and is not used anymore,

• IO713_D0: this signal becomes a User I/O and takes its application configuration,

• CON: this signal is released to a high logic level,

• IO303_INIT: this signal becomes a User I/O and takes its application configuration,

• IO259_LDC: this signal becomes a User I/O and takes its application configuration,

• IO265_HDC: this signal becomes a User I/O and takes its application configuration,

• RESETN: this signal is an input which immediately reset the configuration logic to a Manual Reset lifephase.

ATF280F bảng dữ liệu(PDF) 28 Page - ATMEL Corporation