STMPE2401 datasheet(16/55 Pages) STMICROELECTRONICS

Part #	STMPE2401

Description	24-bit Enhanced port expander with Keypad and PWM controller Xpander logic

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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I2C Interface

STMPE2401

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6.7

Operation modes

Figure 3.

Master/slave operation modes

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 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. 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 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. An example of a non-

increment address is Data Port for initializing the PWM commands.

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