Interfacing The TLC5615 DAC

blueice

hello..
Im interfacing TI's TLC5615 DAC to the BS2 .Its a 10 bit DAC ..

According to the datasheet i have to clock in 10 bits plus two dummy bits .That makes 12 bits

So my SHIFTOUT command is as follows

SHIFTOUT dac_DIN,dac_SCLK,1,[noparse][[/noparse]i/12]

where
dac_DIN...input data line
dac_SCLK..clock line
1...MSB first
i ...my dac data ranging from 1 to 1023

My reference is at 2 volts

My qusetion is..
How do i append the 2 dummy bits to my DAC data?

See page 8 and 9 of the TLC5615 datasheet
http://www-s.ti.com/sc/ds/tlc5615.pdf

Thanks in advance


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**·ice**

Gerard Sequeira
Machinegrid.com·:: Robots at Work!!
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Autonomous Robots,
PIC16F84a Temperature Controller
·

Jon Williams

Based on the TLC5616 docs, I think your SHIFTOUT stream should look like this:

SHIFTOUT Dpin, Cpin, MSBFIRST, [noparse][[/noparse]%1111\4, dacVal\10, %00\2]

This stream sends four dummy bits (1s), the DAC value, the pads with two zeros.· Note that the bits parameter uses the back-slash ( \ ) and not the division ( / ) operator.

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Jon Williams
Applications Engineer, Parallax
Dallas, TX· USA

Post Edited (Jon Williams) : 2/2/2005 2:23:32 PM GMT

blueice

Jon..Thanks a lot..
That worked like a dream...
No problems at all....




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**·ice**

Gerard Sequeira
Machinegrid.com·:: Robots at Work!!
Parallel Port Tutorials,
Autonomous Robots,
PIC16F84a Temperature Controller
·