Four-way Audio I2s/iis Switching Module Buffer Expansion I2s 4 Way Selection 1

Description

Four-way Audio I2s/iis Switching Module Buffer Expansion I2s 4 Way Selection 1
Four-way audio I2S/IIS switching module! Choose one of four! I2S buffer! I2S 4 choose 1 module!
The function of this module is up to four I2S signal inputs, select one of them to transmit to the following DAC decoder and other equipment! (Only one of the four channels can be selected for use, and the four channels cannot be combined into one channel). . .
This module is controlled by a single-chip microcomputer (the board has been integrated with a single-chip microcomputer and the program has been written, and the buyer does not need to use the single-chip control). The buyer only needs to connect the external button to choose which signal to use (note that the external button is without lock) Not a switch), and with power-off memory function (the signal selected last time will be used automatically when the machine is turned on next time). When using one of the signals, completely block the other three signals to avoid interference. Each signal can transmit up to 8 signal lines, except for the 4 used to transmit I2S signals, the remaining four can be used to transmit other signals, such as DSDON signal mute signals, etc. (Of course, the remaining four wires can also be used to transmit another set of I2S For four-channel use, you can use it freely).
Detailed introduction:
The IN-A IN-B IN-C IN-D interface on the board is a four-channel signal input. The OUT interface is output. But interface external key switch signal use. The POWER (or + G) interface is a 5V DC supply voltage for the power interface.
The new version of the interface definition was updated on July 27, 2019. For users who purchased before, please check the old version of the definition!
The input and output interface definitions are as follows (note that the new version is distinguished from the old version, the new version has square and dot identifiers on the board, and the old version is marked with the number 1 next to the interface): the input and output interface definitions are the same but the signal directions are different IN-A IN-B IN -C IN-D direction is input, OUT direction is output!
It should be noted that when one of the signal lines such as D1 is used as a DATA data line, then D1 of all input and output interfaces must be used as DATA; the same is true for D2-D8.
Note: The GND of each board can only be connected to GND. D1-D8 cannot be used as GND! D1-D8 can only be connected to signals and cannot replace GND to connect to the front and rear boards! ! ! You can only use the GND pin when connecting to the GND of the front and rear boards! ! ! ! !
The + of the power interface is connected to 5V and G is connected to GND. Wrong connection will cause damage to the board!
When the But interface is connected to the button, the two wires of the button must be connected to the But interface, please do not lead from other places, and the two wires connected to the button cannot be connected to any other places, otherwise any problems will occur at your own risk!
The A B C D V 5 single-character interface on the board is used for connecting to LED display (the new version V character is changed to 3.3V)! The connection method is as follows:
Note: The LED and other accessories need to be prepared by the buyer, and the LED is connected to 3.3V (the position of V in the figure above)!