Part Number:ADS7953
Tool/software: WEBENCH® Design Tools
Hi,
I am trying to program ADS7951 to auto1 mode with range 2 i.e. 0 to 5 V with following sequence
>> wr 0x4200
>> wr 0x8000
>> wr 0xFFFF
>> wr 0x2C40
>> wr 0x000 all
But when i vary my potentiometer connected to channel 4 at 2.5V itself the ADC converted value gets set to 4095 whereas it should get set to 2046 i.e half of the 5V count.
I am able to change from 2.5 to 5 V in manual mode by writting 0x1840 in mode register but not able to change in auto mode 1.
How can i verify that my device has switched to auto mode1?
is the sequence that i am writiing to change to auto mode1 and range 5v right?
Thank you
Regards,
Chandrakant Pal
Thanks
for your replay.
I follow your instruction give the below instruction to configure the divice
//we dont use GPIO, so omit the instruction of 0x4200 and 0x4001
>> wr 0x8000 // Program Register for Auto-1 Frame 1
>> wr 0xFFFF // Program Register for Auto-1 Frame 2, to select all 16 channles
>> wr 0x2C00 // Enable Auto-1 Mode, counter set to lower programmed channel (Ch1)
>> wr 0x2841 // Stay in Auto-1 Mode, enable increment counter, Range 2 operation and GPIO set as output high
>> wr 0x000 all