STMPE1601 datasheet(14/58 Pages) STMICROELECTRONICS

14 / 58 page

I2C interface

STMPE1601

14/58

6.7

Operating modes

Figure 3.

I2C transaction

Table 13.

Operating 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 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 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. An example of such

a non-increment address is FIFO.

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. For those register addresses that fall within

a non-incremental address range, the address will be kept static

throughout the all write operations. Refer to the memory map table for

the address ranges that are auto and non-increment. An example of a

non-increment address is Data Port for initializing the PWM

commands.

Device

Address

Reg

Address

Device

Address

Data

Read

One byte

Read

Device

Address

Reg

Address

Device

Address

Data

Read

More than one byte

Read

Data

Read + 1

Data

Read + 2

Device

Address

Reg

Address

Data

to be

written

One byte

Write

More than one byte

Read

Device

Address

Reg

Address

Data to

Write

Data to

Write + 2

Data to

Write + 1

Master

Slave

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