1BitFeverDreams: /* How to use the CODEC */ link to datasheet

2025-03-11T16:56:27Z

How to use the CODEC: link to datasheet

← Older revision		Revision as of 12:56, 11 March 2025
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	The Codec chip is a way to mix and match audio signals together for their single audio output (headphones, RCA jacks).		The Codec chip is a way to mix and match audio signals together for their single audio output (headphones, RCA jacks).

			Its datasheet can be found in the goodies github repo: https://github.com/Mu0n/F256MiscGoodies/blob/main/datasheets/WM8776_v4.1-532420.pdf

	=== Codec Registers ===		=== Codec Registers ===

1BitFeverDreams: Created page with "== How to use the CODEC == The Codec chip is a way to mix and match audio signals together for their single audio output (headphones, RCA jacks). === Codec Registers === {| class="wikitable" ! Address !! R/W !! B7 !! B6 !! B5 !! B4 !! B3 !! B2 !! B1 !! B0 !! Purpose |- | 0xD620 || W|| D7|| D6|| D5|| D4|| D3|| D2|| D1|| D0|| Command Low |- | 0xD621 || W || R6|| R5|| R4|| R3|| R2|| R1|| R0|| D8|| Command High |- | 0xD622 || R|| X|| X|| X|| X|| X|| X|| X|| Busy|| Status..."

2025-02-16T07:41:37Z

Created page with "== How to use the CODEC == The Codec chip is a way to mix and match audio signals together for their single audio output (headphones, RCA jacks). === Codec Registers === {| class="wikitable" ! Address !! R/W !! B7 !! B6 !! B5 !! B4 !! B3 !! B2 !! B1 !! B0 !! Purpose |- | 0xD620 || W|| D7|| D6|| D5|| D4|| D3|| D2|| D1|| D0|| Command Low |- | 0xD621 || W || R6|| R5|| R4|| R3|| R2|| R1|| R0|| D8|| Command High |- | 0xD622 || R|| X|| X|| X|| X|| X|| X|| X|| Busy|| Status..."

New page

== How to use the CODEC ==

The Codec chip is a way to mix and match audio signals together for their single audio output (headphones, RCA jacks).

=== Codec Registers ===

{| class="wikitable"
! Address !! R/W !! B7 !! B6 !! B5 !! B4 !! B3 !! B2 !! B1 !! B0 !! Purpose
|-
| 0xD620 || W|| D7|| D6|| D5|| D4|| D3|| D2|| D1|| D0|| Command Low
|-
| 0xD621 || W || R6|| R5|| R4|| R3|| R2|| R1|| R0|| D8|| Command High
|-
| 0xD622 || R|| X|| X|| X|| X|| X|| X|| X|| Busy|| Status
|-
| 0xD622 || W|| X|| X|| X|| X|| X|| X|| X|| Start|| Control
|}

=== How to enable (unmute) every sound device ===

* Loop-read 0xD622 and wait until bit0 is set to 1
* Send 0x1F to Command Low at 0xD620
* Send 0x2A to Command High at 0xD621
* Loop-read 0xD622 and wait until bit0 is set to 1

=== Audio input devices on the various machines ===

{| class="wikitable"
! CODEC inputs !! F256Jr !! F256K !! F256K2 !! F256Jr2
|-
| AIN1|| SID|| SID|| SAM2695 MIDI|| SAM2695 MIDI
|-
| AIN2|| Line in onboard header || OPL3|| MIDI wavetable||
|-
| AIN3|| || || PWM|| PWM
|-
| AIN4|| || || VS1053b|| VS1053b
|-
| AIN5|| || Line in onboard header|| Line in onboard header|| Line in onboard header
|}

Here's a precise pinout diagram of the F256K as an example

[[File:Codec.png|none|thumb|Pinout diagram for the Codec chip]]

Use the CODEC - Revision history

1BitFeverDreams: /* How to use the CODEC */ link to datasheet