i2c for tlv320aic3204

Kelvin You

Intellectual 680 points

Other Parts Discussed in Thread: TLV320AIC3110, CC3200, TLV320AIC3120

hi all

i just would like to ask what is the actual slave address for the i2c in the tlv32aic3204 i m kinda confusing

from the example for evm is

30 00 01

30 = device address

00 = register address

01 = register bit

but when i flip one exam from the CC3200 package i saw that they set the i2c for tlv320aic3110 is 0x30, but in both data sheet mention that they will response to i2c address 0011000 (0x18)

just wanna ask the device address is as same as the slave address or the i2c address is as per data sheet mention 0x18?

can pls clarify

thank

below attached prove

in the CCS for CC3200

over 9 years ago

0 Don Dapkus over 9 years ago

TI__Guru**** 189399 points

Hi, Kelvin,

I have asked my colleague to comment on your post.

-d2

0 AMIT SHARMA2 over 9 years ago

Intellectual 470 points

I think as i have already seen same with tlv320aic3120. I2C address is 7 bit address 0011000 if you shift right and append 0 it will be 0001 1000= 0x18.

if you capture the i2c SDA line with SCL you may get the same thing.

regards

AMIT

0 Kelvin You over 9 years ago in reply to AMIT SHARMA2

Intellectual 680 points

hi ti engineer and AMIT

currently i really faced some problem

below are some data i nid you all to look through

with slow mode 12c

fast mode i2c with address 0x18

but during in using aic3204cs i saw that we have the data as below

the above are fast mode with address 0x30, even i saw via application note the 1st bit is using 0x30

0 J- over 9 years ago in reply to Kelvin You

TI__Mastermind 46195 points

Hello Kelvin,

Each I2C command is 8-bytes + a NAK bit.

The first command is comprised of the I2C address and R/W bit.

Some MCUs assume the 7-bit address is right justified, meaning that you configure the I2C module with 001 1000 = 0x18. But in reality, the I2C address byte through I2C will be 0011 0000 (0x30) for write and 0011 0001 (0x31) for read because the 7-bit I2C address is left-justified.

Regards,

J-

0 Kelvin You over 9 years ago in reply to J-

Intellectual 680 points

hi j

i have tried both 0x30 and 0x18, both does not have any ack for slave

0 J- over 9 years ago in reply to Kelvin You

TI__Mastermind 46195 points

Hi Kelvin,

Make sure:

Aall power supplies are present
/RESET = IOVDD level
SPI_SELECT = GND

Regards,

J-

0 Kelvin You over 9 years ago in reply to J-

Intellectual 680 points

hi j

i have tried to check

all power supply are connect (during using software aic3204 cs can be program with i2c)

spi_select = ground as it been set to i2c

/reset = in sw3, i have set to run

below are both address 0x18 or 0x30

0x18 i2c

0x30 i2c data

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i2c for tlv320aic3204