| ??? 06/18/05 06:27 Read: times |
#95238 - audio converters? Responding to: ???'s previous message |
Richard Erlacher said:
If you use your 12 MHz, you can get close enough to meet EIA spec's for RS232C communication. The reason people use 11.0592, 12.288, or other frequencies that are harmonics of the standard baud rates is usually because they don't need a precise harmonic of some other rate. 12.288 MHz is a commonly-used frequency for the modulator clock of sigma-delta ADCs and DACs used for audio. If he expects a 48 kHz sample rate, then he really wants to use a 12.288 MHz oscillator or crystal, which are both easy to find in any of several packages. It's a heckuva lot cheaper and cleaner, than using a PLL to take the 12.000 MHz up the couple of notches. -a |
| Topic | Author | Date |
| varying clock frequency | 01/01/70 00:00 | |
| not really | 01/01/70 00:00 | |
| Is not a strange Freq at all. | 01/01/70 00:00 | |
| close enough | 01/01/70 00:00 | |
| Baud Rate Errors? | 01/01/70 00:00 | |
audio converters? | 01/01/70 00:00 | |
| results | 01/01/70 00:00 |