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DAC8512FSZ Datasheet(PDF) 19 Page - Analog Devices |
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DAC8512FSZ Datasheet(HTML) 19 Page - Analog Devices |
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19 / 20 page  DAC8512 –19– REV. A TFRLP LDAA 0,X Get a byte to transfer via SPI STAA SPDR Write SDI data reg to start xfer * WAIT LDAA SPSR Loop to wait for SPIF BPL WAIT SPIF is the MSB of SPSR * (when SPIF is set, SPSR is negated) INX Increment counter to next byte for xfer CPX #SDI2+1 Are we done yet ? BNE TFRLP If not, xfer the second byte * *Update DAC output with contents of DAC register * BCLR PORTD,Y $20 Assert LD/ BSET PORTD,Y $20 Latch DAC register * BSET PORTC,Y $01 De-assert CS/ PULA When done, restore registers X, Y & A PULY PULX RTS ** Return to Main Program ** |
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