Differences

This shows you the differences between two versions of the page.

--- midibox_fm_21 [2016/04/24 00:03] – [Connection of OPL3 module to STM32F4 core] sauraen
+++ midibox_fm_21 [2016/06/02 02:30] (current) – [Connection of OPL3 module to STM32F4 core] sauraen
@@ Line 11: / Line 11: @@
 (Information from [[http://svnmios.midibox.org/filedetails.php?repname=svn.mios32&path=%2Ftrunk%2Fmodules%2Fopl3%2FReadme.txt]])
-The OPL3's Reset line must be buffered to 5 volts; all the other inputs may be driven by 3.3 volts.
+The OPL3's Reset line must be buffered to 5 volts (that's why it's connected to J19, which has the buffer already); all the other inputs may be driven by 3.3 volts. All the digital pins of both OPL3 modules are connected together (in pairs, respectively), except for the #CS (#WR) pins which are connected separately so the core can send each chip different data.
 Pinout:
-  * OPL3 D7:0 -> PE15:8 (J10A D7:0)
+  * OPL3 D7:0 -> PE15:8 (J10A.D7:0)
-  * OPL3 A1:0 -> PE7:6 (J10B D15:14)
+  * OPL3 A1:0 -> PE7:6 (J10B.D15:14)
-  * OPL3 RS (#IC) -> PB8 (J19:RC2)
+  * OPL3 RS (#IC) -> PB8 (J19.RC2)
-  * First OPL3 WR (#CS, #WR) -> PE5 (J10B D13)
+  * First OPL3 WR (#CS, #WR) -> PE5 (J10B.D13)
-  * Second OPL3 WR (#CS, #WR) -> PE4 (J10B D12)
+  * Second OPL3 WR (#CS, #WR) -> PE4 (J10B.D12)
 The pins used for RS and the two CS pins may be changed by defining the appropriate things in your mios32_config.h file. See the README from the OPL3 module above. (Or just use the MIDIbox FM V2.1 code and hook the wires up as shown here.)
+The analog side of the OPL3 module may be built standard or customized to your liking (5V version, additional mixing that I added, etc.). This has no relation to how the digital side is connected to the core.