STMPE812 datasheet(9/51 Pages) STMICROELECTRONICS

9 / 51 page

STMPE812

I2C interface

Doc ID 17732 Rev 3

9/51

Figure 5.

Read and write modes (random and sequential)

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 the register address auto-increments internally after

every byte of data being written in. For those register addresses that

fall within a non-incremental address range, the address is kept static

throughout the entire write operation. Refer to the memory map table

for the address ranges that are auto and non-increment.

Table 4.

Operating modes

Mode

Byte

Programming sequence

AM04175V1

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

Obsolete

Product(s)

- Obsolete

Product(s)

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