ADAU1372 Setting up

Hi,

We are starting to use using the ADAU1372 to replace an old A/D converter.

We are supplying an external clock (MCLK)  of 18.75MHz. I'm basing my calculation on the 19.2MHz example in the datasheet but changing the fraction part to match my needs.

24.576/18.75 = 1/4 * (5 + (6/25))

Code - o/p data sent on the I2C bus:

Reg 0x00

data 0x10

Send data out

Reg 0x01

data 0x00

send data out

Reg 0x02

data 0x19

send data out

Reg 0x03

data 0x00

send data out

Reg 0x04

data 0x06

send data out

Reg 0x05

data 0x2B

send data out

Reg 0x00

data 0x09

send data out

Poll for the PLL lock status

Reg 0x00

data 0x99

send data out

Then to test I'm changing the reg 0x08 (REGULATOR CONTROL REGISTER). To see if I can change the voltage on the output pin from 1.1v to 1.2v, to confirm the A/D is set up and happy.

Reg 0x08

data 0x00

send data out

Current It's not working, any help will be greatly appreciated.

Regards

MukhtarB