diff options
| author | Solomon Peachy <pizza@shaftnet.org> | 2020-08-07 08:04:19 -0400 |
|---|---|---|
| committer | Solomon Peachy <pizza@shaftnet.org> | 2020-08-07 15:55:31 -0400 |
| commit | b3a0187416e48d80275af6be0178cef155aa03dc (patch) | |
| tree | e03f1c62ff20fb0968fc1b50194a7041fe651cf2 /rbutil | |
| parent | eb0e41c1ccb0dcf35efa7e1434bb0e35c9df1543 (diff) | |
| download | rockbox-b3a0187416e48d80275af6be0178cef155aa03dc.tar.gz rockbox-b3a0187416e48d80275af6be0178cef155aa03dc.zip | |
jz4760: Major clocking improvements for audio PLL
* for <= 48KHz, BCLK must be 256*freq (ie bdiv = 4)
* for <= 96KHz, BCLK must be 128*freq (ie bdiv = 2)
* for 11/22/44/88 KHz, disable PLL1 and run off XTAL
* cut PLL1 with 12/24/48/98 KHz audio from 516->86MHz
* cut PLL1 with 8/16/32/64 KHz audio from 426->106.5MHz
This should result in significant power savings for
common 44.1KHz audio playback, and pretty good savings
for everything else.
As an added bonus:
* enable de-emphasis filters at 32, 44.1, and 48 KHz
Change-Id: Ie59067cd46c47e62abf4a32c53519efad104d6c8
Diffstat (limited to 'rbutil')
0 files changed, 0 insertions, 0 deletions