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: Difference between revisions
From SnesLab
(S-DSP is not connected to MCK so it has to be getting its clock from the APU OSC) |
(connected to capacitors) |
||
| Line 2: | Line 2: | ||
The '''APU oscillator''' (X2) is clocked at 24.6 MHz, slightly faster than the [[master clock]]. | 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]]. | * 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]]. | * Side 2 is XTALI, connected to pin 46 of the [[S-DSP]] and C71. | ||
XTAL stands for "crystal." It does not clock the [[S-SMP]] directly. | It is not connected to anything else. XTAL stands for "crystal." It does not clock the [[S-SMP]] directly. | ||
=== See Also === | === See Also === | ||
Revision as of 17:15, 18 August 2024
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." 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