We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
APU Oscillator
From SnesLab
(Redirected from DSP Clock)
The APU oscillator (X2) is in region 3C of the jwdonal schematic
The APU oscillator (X2) is clocked at 24.6 MHz, slightly faster than the master clock.
- Side 1 is XTALO, connected to pin 45 of the S-DSP and C72.
- Side 2 is XTALI, connected to pin 46 of the S-DSP and C71.
It is not connected to anything else. XTAL stands for "crystal," but according to a board photo[3] X2 is actually a ceramic oscillator. It does not clock the S-SMP directly.
See Also
References
- http://problemkaputt.de/fullsnes.htm#snestimingoscillators
- Figure 2-22-1 on page 2-22-2 of the official Super Nintendo development manual
- Sanglard, Fabien. The Hearts of the Super Nintendo. https://fabiensanglard.net/snes_hearts