i.MX ProcessorsのトピックRe: iMX6Q SSI slave mode timing specifications

iMX6Q SSI slave mode timing specifications

ThierryH_ — Thu, 24 Nov 2016 16:55:32 GMT

Hi,

We are using SSI in I2S slave mode with 24 bits audio sample . Sample frequency is 48KHz up to 192KHz.

Into the "i.MX 6Dual/6Quad Applications Processors for Industrial Products, Rev. 4, 07/2015", chap 4.11.19.3 SSI Transmitter Timing with External Clock mention :

AUDx_TXC (Input), timing SS22 = 81.4ns min (12.285.. MHz max)

I2S slave = 2 time slot of 32 bits = 64 bits per frame =

@48KHz : 48000*2*32 = 3.072MHz
@192KHz : 192000*2*32 = 12.288MHz

Does it means that @192KHz I2S 32bits shouldn't work correctly...?

Thanks

Re: iMX6Q SSI slave mode timing specifications

art — Tue, 29 Nov 2016 12:25:12 GMT

The i.MX6Q SSI module does not support 32-bit wide samples. The maximum sample width supported is 24 bits.

Have a great day,
Artur

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