Editing Clocks

Jump to navigation Jump to search
Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.

The edit can be undone. Please check the comparison below to verify that this is what you want to do, and then publish the changes below to finish undoing the edit.

Latest revision Your text
Line 1: Line 1:
= Overview =
= Overview =
Clock generation differs between [[Motherboards]].


= A, A+, AB, B, B', C, C', D, D' chassis =
All boards (GH-001, GH-003, GH-005, GH-007, GH-012, GH-014, GH-016) that have the original [[Graphics_Synthesizer|GS]] (with metal heat spreader, CXD2934GB) have an additional clock generator IC.  
Clock generation is based around one or two "DRCG-lite" (DRCG = Direct Rambus Clock Generator) clockgen ICs by varying manufacturers (Cypress CY2212 or TI CDCR61A).


===DRCG-lite #1===
This additional clockgen is not found on their same-chassis-counterparts (GH-004, GH-006, GH-008, GH-010, GH-013) that use the second revision GS (CXD2944GB).
All of these boards have an DRCG-lite IC which has an 18.432 Mhz XTAL connected to it's inputs. This DRCG-lite is set for a multiplier of 64/3 and thus creates a 393.216 Mhz clock for [[Emotion Engine|EE]] and [[Rambus DRAM|RDRAM]].
 
===DRCG-lite #2===
''This additional DRCG is not found on boards from the same chassis types that use the second revision GS (CXD2944GB) (GH-004, GH-006, GH-008, GH-010, GH-013).''
 
All boards that have the original [[Graphics_Synthesizer|GS]] with metal heat spreader, CXD2934GB (GH-001, GH-003, GH-005, GH-007, GH-012, GH-014, GH-016), have a second DRCG-lite IC (also with an 18.432 Mhz XTAL) which is set to a multiplier of 16 to generate a 294.912 Mhz clock which is fed into GS.
= F, G, H chassis =
Based around one "DRCG-lite" and one "GMCG" (=Graphics Media Clock Generator, e.g. Cypress CY24141) clock generator.
 
===GMCG===
The GMCG has a 18.432 Mhz XTAL and generates a 54 Mhz or 53.9 Mhz clock for GS (selection between 54 and 53.9 is done via control line from [[SSBUS controller]], later from the SPU2+SSBUS-Controller combo IC) and also creates a 18.432 Mhz input clock for the DRCG-lite.
 
===DRCG-lite===
The main clock output of DRCG-lite is set for a multiplier of 64/3 and thus creates a 393.216 Mhz clock for [[Emotion Engine|EE]] and [[Rambus DRAM|RDRAM]]. Additionally, DRCG lite generates a 9.216 Mhz clock signal for GS from the 18.432 Mhz input via a multiplier of 0.5.
 
= I, J, K, L, M chassis =
Based around one single DRCG-lite compatible clock generator with an 18.432 Mhz XTAL, generating a 393.216 Mhz clock, which additionally also generates the selectable 54 Mhz or 53.9 Mhz clock (e.g. Cypress CY22313).
 
= N, P, R chassis =
Based around one single clock generator IC with an 18.432 Mhz XTAL, similar, but not identical to the "GMCG" mentioned above. It outputs a 18.432 Mhz clock (for EE/the SoC of these chassis), a 25 Mhz clock (for the ethernet transceiver) and a (likely switchable) 54/53.9 Mhz clock (for GS, see above). Part number on IC case is always (?) '''627G04LF'''. Not much else is known, since no public datasheet is available.
Please note that all contributions to PS2 Developer wiki are considered to be released under the GNU Free Documentation License 1.2 (see PS2 Developer wiki:Copyrights for details). If you do not want your writing to be edited mercilessly and redistributed at will, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource. Do not submit copyrighted work without permission!

To protect the wiki against automated edit spam, we kindly ask you to solve the following hCaptcha:

Cancel Editing help (opens in new window)
Retrieved from "http://www.psdevwiki.com/ps2/Clocks"