LPC4337 and NAU8822LYG codec

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LPC4337 and NAU8822LYG codec

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moller
Contributor II

Hello there.
First time working with I2S on an ARM processor. I am using an LPC4337 (LBGA256) and want to use the NAU8822LYG CODEC.
This codec has;
MCLK
BCLK
FS
DACIN
ADCOUT
The UM19503 manual states two kinds of 4-wire operating modes (transmitter mode and receiver mode).
I am very much in doubt how to connect these 5 I2S pins from the CODEC to my processor. (I want to use I2S0).
I assume MCLK and BCLK can be combined. Any help would be welcomed!


Thanks in advance.

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bernhardfink
NXP Employee
NXP Employee

MCLK does not belong to the I2S interface definition. See more info to this pin in chapter 8 of the NAU8822 data sheet.

MCLK  -  master clock for the CODEC device

BCLK  -  bit clock of the I2S data 

FS  -  frame sync signal

DACIN  - data input of the CODEC device
ADCOUT  -  data output of the CODEC device

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moller
Contributor II

Hello and thanks for your answer.

I do have a hard time figuring out the connections from BCLK, FS, DACIN and ADCOUT to the LPC43xx processor. I can see there are many ways of doing 4-wire setups but none of them makes any sense to me and gives answer to which pin goes to BCLK etc. 

Kind regards

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