ST72345C4 datasheet(176/247 Pages) STMICROELECTRONICS

Il numero della parte	ST72345C4

Spiegazioni elettronici	SCI asynchronous serial interface

PDF	247 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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176 / 247 page

On-chip peripherals

ST72344xx, ST2345xx

176/247

Doc ID 12321 Rev 6

Figure 80.

Random read (dummy write + stop + start + current address read)

Figure 81.

Sequential read

Figure 82.

Combined format for read

Legend: SA - Slave Address, BA - Byte Address, W: Write, R: Read

11.7.6

Low-power modes

Start

Ack

Start

R Ack

Data

Nack

Stop

Start

Ack

Data Nack

Stop

RData

Data

Start

Ack

Data

Nack

Restart

Ack

Data

Nack

Stop

Table 68.

Mode description

Mode

Description

Wait

No effect on I2C interface.

I2C interrupts causes the device to exit from Wait mode.

Halt

I2C registers are frozen.

In Halt mode, the I2C interface is inactive and does not acknowledge data on the bus.

The I2C interface resumes operation when the MCU is woken up by an interrupt with

“exit from Halt mode” capability.

Active-halt

I2C registers are frozen.

In Active halt mode, the I2C interface is inactive and does not acknowledge data on the

bus. The I2C interface resumes operation when the MCU is woken up by an interrupt

with “exit from Active-halt mode” capability.

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