| ??? 03/13/08 13:24 Read: times |
#152223 - ADC Responding to: ???'s previous message |
hi,
Clock frequency is 18.432mhz. if i give input A0=1,A1=0,A2=0,A3=0,A15=0(A15 enable decoder) to decoder,it selects cs_adc which is one of the decoder output.then cs_adc is ORed with /WR from MCU.then output of the OR gate is given into NOT gate as input.finally output of the NOT gate is given into both ALE and START pin of the adc0808.again cs_adc is ORed with /RD from MCU.then output of the OR gate is given into NOT gate as input.finally output of the NOT gate is given into OE pin of the adc0808.EOC is used as an external hardware interrupt.here i select analog i/p 8.according to datasheet A0=A1=A2=1 which select the analog input8. Muthu |
| Topic | Author | Date |
| ADC | 01/01/70 00:00 | |
| is there some monitor involved? | 01/01/70 00:00 | |
| Muthu, would you please be so kind... | 01/01/70 00:00 | |
| ADC | 01/01/70 00:00 | |
| Strange Hookup | 01/01/70 00:00 | |
| What, exactly, does this imply? | 01/01/70 00:00 | |
| it has hurt many to sit down after they ... | 01/01/70 00:00 | |
| ADC | 01/01/70 00:00 | |
compare your ADC timing with data sheet p4 | 01/01/70 00:00 |