ST72652 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72652

LOW-POWER, FULL-SPEED USB 8-BIT MCU WITH 32K FLASH, 5K RAM, FLASH CARD I/F, TIMER, PWM, ADC, I2C, SPI

STMicroelectronics 

ST7265x

I²C SINGLE MASTER BUS INTERFACE (Cont’d)

11.7.5 Low Power Modes

Mode

WAIT

HALT

Description

No effect on I2C interface.

I2C interrupts cause the device to exit from WAIT mode.

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.

11.7.6 Interrupts

Figure 69. Event Flags and Interrupt Generation

ITE

BTF

SB

AF

INTERRUPT

*

EVF

* EVF *can also be set by EV2 or an error from the SR2 register.

Interrupt Event

End of Byte Transfer Event

Start Bit Generation Event (Master mode)

Acknowledge Failure Event

Note: The I2C interrupt events are connected to

the same interrupt vector (see Interrupts chapter).

They generate an interrupt if the corresponding

Enable Control Bit is set and the I-bits in the CC

register are reset (RIM instruction).

Event

Flag

BTF

SB

AF

Enable

Control

Bit

ITE

Exit

from

Wait

Yes

Yes

Yes

Exit

from

Halt

No

No

No

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