I2C module

STMPE801

12/26

5.7

Operation modes

Figure 5.

Read and write modes (random and sequential)

Table 8. Operation modes

Mode

Bytes

Programming Sequence

Read

≥1

START, Device Address, R/W = 0, Register Address to be read

RESTART, Device Address, R/W = 1, Data Read, STOP

If no STOP is issued, the Data Read can be continuously preformed. If

the register address falls within the range that allows address auto-

increment, then register address auto-increments internally after every

byte of data being read. For register address that falls within a non-

incremental address range, the address will be kept static throughout the

entire read operations. Refer to the Memory Map table for the address

ranges that are auto and non-increment.

Write

≥1

START, Device Address, R/W = 0, Register Address to be written, Data

Write, STOP

If no STOP is issued, the Data Write can be continuously performed. If

the register address falls within the range that allows address auto-

increment, then register address auto-increments internally after every

byte of data being written in. For register address that falls within a non-

incremental address range, the address will be kept static throughout the

entire write operations. Refer to the Memory Map table for the address

ranges that are auto and non-increment.

One Byte

Read

More than

One Byte

Read

One Byte

Write

More than

One Byte

Write

Master

Slave

Data to

Write + 1

Data to

Write + 2

Dev

Addr

Reg

Addr

Data to

Write

Data

Read + 1

Data

Read + 2

Dev

Addr

Reg

Addr

Data to

be

Written

Dev

Addr

Reg

Addr

Dev

Addr

Data

Read

Dev

Addr

Reg

Addr

Dev

Addr

Data

Read