STMPE1801 datasheet(16/60 Pages) STMICROELECTRONICS

No. de pieza	STMPE1801

Descripción Electrónicos	Xpander Logic™ 18-bit enhanced port expander with keypad controller

PDF	60 Pages

Scroll/Zoom	100%

Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

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16 / 60 page

I2C specification

STMPE1801

16/60

Doc ID 17884 Rev 3

Figure 3.

Operating modes

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-increment 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 entire write operation. Refer to Table 8.: STMPE1801

and non-increment. An example of a non-increment address is Data

Port for initializing the PWM.

Table 9.

Operating modes

Mode

Byte

Programming sequence

One Byte

Read

More than

One Byte

Read

One Byte

Write

More than

One Byte

Write

Master

Slave

Dev

Addr

Reg

Addr

Dev

Addr

Data

Read

Data

Read + 2

Dev

Addr

Reg

Addr

Data to

Written

Dev

Addr

Reg

Addr

Dev

Addr

Data

Read

Data to

Write + 1

Data to

Write + 2

Dev

Addr

Reg

Addr

Data to

Write

Data

Read + 1

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