HP203B datasheet(9/18 Pages) ETC2

9 / 18 page

DataSheet

HP203B

HP203B_DataSheet_EN_V2.0

www.hoperf.com

9 / 18

5.2 I²C Device and Register Address

The I²C device address is shown below. The LSB of the device address is determined by the status of

the CSB pin:

CSB PIN=0: corresponding to address 0XEE (write) and 0XEF (read).

CSB PIN=1: corresponding to address 0XEC (write) and 0XED (read).

W/R

CSB =0 : 1

0/1

CSB =1 : 0

5.3 I²C Protocol

The 1

st TYPE: the host issuing a single byte command to the device

The host shall issue the Device Address (ID) followed by a Write Bit before sending a Command byte.

The device will reply an ACK after it received a correct SOFT_RST command.

/CS

Device Address

Command

The 2nd TYPE: the host writing a register inside the device

The host shall issue the Device Address (ID) followed by a Write Bit before sending a command byte

and a data byte. This format only applies while the user wants to send the WRITE_REG command.

1 1 1 0 1 1 /CSB 0 0 1 1 0 0 1 0 1 0 0 0 0 0 0 0 1 1 0 0

Device Address W A

Command

Data

A P

The 3rd TYPE: the host reading a register from the device

In this activity there are two frames that are sent separately. The first frame is to send the

READ_REG command which contains a 2-bit binary number of 10 followed by a 6-bit register

address. The format of the first frame is identical to the 1

st type activity. In the second frame, the

device will send back the register data after receiving the correct device address followed by a read

bit. This format only applies while the user wants to use the READ_REG command.

1 1 1 0 1 1 /CSB 0

0 1 0 0 0 0 1 1 0

Device Address

Command

HP203B bảng dữ liệu(PDF) 9 Page - List of Unclassifed Manufacturers