Forum Discussion
Altera_Forum
Honored Contributor
Honored ContributorADC0809 with cyclone III
Hello Guys,
I am familiar with ADC0809, 0804 chips with 8051 controllers. Similarly i want to try on Cyclone III device.Can it be done? Or i need to change the ADC Chip. For your info my board is custom made. Regards Kiran6 Replies
Altera_Forum--- Quote Start --- SN74LVC4245ADW has 8-bit bidirectional transceiver bus. For select line you have to use another. As ADC select line will be output from FPGA, but 8-bit output Bus of ADC will be Input to FPGA. --- Quote End --- No. INTR pin is the input to FPGA. So this pin i need to take care. For One pin i dont think so of using one more IC.- Altera_Forum
SN74LVC4245ADW has 8-bit bidirectional transceiver bus. For select line you have to use another. As ADC select line will be output from FPGA, but 8-bit output Bus of ADC will be Input to FPGA.
- Altera_Forum
Ya thanks dude. You solved my major problem.But ADC0804 has 8 data lines and 3 control lines.(RD,WR,INTR). So i need to use one more LVC4245. Or is there any more no.of data lines available chip.
regards Kiran - Altera_Forum
You Can use Level Translator 5v to 3.3v.
Just see this part no. SN74LVC4245ADW - Altera_Forum
Ya. i understood. So in this i cant use ADC0809(IO levels are 5V) Can you suggest me IO levels of 2.5-3.3V
Regards Kiran - Altera_Forum
Hi,
There is no problem to connect ADC with FPGA, only the interface pins of ADC should match with FPGA I/O Levels. -- Regards, Chander
