Analog Devices ADSP-21535 E-KIT LITE 用户手册

The ADSP-21535 has 16 asynchronous Programmable Flag (PF) I/O pins.  
During reset PF0-PF9 function as inputs to the internal PLL of the DSP.  They are 
not valid until 120uS after reset.  

describes how the PFs are used on the 

EZ-KIT Lite.   

After a DSP reset, all of the PF pins are initialized as inputs.  The direction of the 
PF is configured by the FIO_DIR Memory Mapped Register (MMR).  The PFs 
are set high (1) using the FIO_FLAG_S and cleared (0) using the FIO_FLAG_C 
MMRs.  For more information on configuring the PF pins, see the ADSP-21535 
DSP Hardware Reference Manual.   

All of the PFs can are brought out to the expansion connector P2.  The location of 
the PF nets can be found in 

PF0

 

LED4 

PF1 

LED1 

PF2 

LED2 

PF3 

LED3 

PF0-3 are connected to the LEDs.   These can be used 
to light an LED when a routine completes.   

PF4 

SW4 

PF5 

SW5 

PF6 

SW6 

PF7 

SW7 

PF4-7 are connected to the push buttons on the EZ-
KIT Lite board and are for user input.  Your routine 
can monitor and execute specific code when a push 
button has been pressed. 

PF8 

 

Not used 

PF9 

 

Not used 

PF10 

 

Not used 

PF11 

 

Not used 

PF12 

PMGMT0 

PF13 

PMGMT1 

PF14 

PMGMT2 

These are used to change the internal voltage of the 
DSP.  Refer to section 

 for more information. 

PF15 

U7.11 

Connected to the reset of the AD1885 Codec (U7).  
This signal must be output as a high (1) to enable the 
AD1885 Codec.   

 

 

ADSP-21535 EZ-KIT Lite Evaluation System Manual 

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