How to read Device ID of FDC1004 ?

Hi,

I developed a PCB and used FDC1004 on it. My uConroller works at 5 V and as known as FDC1004 works at 3.3V. I used TXB0106 Level Shifter at SDA and SCL pins. Communication pins(SDA and SCL) pulled up to Vdd with pull-up resistors (4.7K). I dont know if i had mistake so far.

I want to read firstly Device ID. At datasheet, Figure.14 shows I2C read prochedure of FDC1004. Clearly seems it has 5 steps.

- 7 bit Serial Bus Adress Byte(Write) [0xA0]

- Pointer Register Byte [0xFF]

- 7 bit Serial Bus Adress Byte(Read) [0xA1]

- Data MSB from Slave

- Data LSB from Slave

Code Example :

  I2C1_Start();                       // issue I2C start signal
  I2C1_Wr(0xA0);                 // send byte via I2C  (device address + W)
  I2C1_Wr(0xFF);                 // send byte (address of Device ID)
  I2C1_Start();                       // issue I2C signal repeated start
  I2C1_Wr(0xA1);                 // send byte via I2C  (device address + R)
  DeviceID_MSB = I2C1_Rd(1);       // Read the data (Acknowledge)
  DeviceID_LSB = I2C1_Rd(0);        // Read the data (NO acknowledge)
  I2C1_Stop();                       // issue I2C stop signal

As result of debug, the program not passing under the line of I2C1_Wr(0xA0);.  I2C clock speed is 100kHz.

Is there any mistake about my works? or what i could be miss?

Thank you so much.