参数资料
型号: ST72F321J7T1
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP44
封装: 10 X 10 MM, PLASTIC, TQFP-44
文件页数: 21/176页
文件大小: 1112K
代理商: ST72F321J7T1
ST72321J
117/176
I2C BUS INTERFACE (Cont’d)
10.7.5 Low Power Modes
10.7.6 Interrupts
Figure 63. Event Flags and Interrupt Generation
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-bit in the CC reg-
ister is reset (RIM instruction).
Mode
Description
WAIT
No effect on I2C interface.
I2C interrupts cause 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.
Interrupt Event
Event
Flag
Enable
Control
Bit
Exit
from
Wait
Exit
from
Halt
10-bit Address Sent Event (Master mode)
ADD10
ITE
Yes
No
End of Byte Transfer Event
BTF
Yes
No
Address Matched Event (Slave mode)
ADSEL
Yes
No
Start Bit Generation Event (Master mode)
SB
Yes
No
Acknowledge Failure Event
AF
Yes
No
Stop Detection Event (Slave mode)
STOPF
Yes
No
Arbitration Lost Event (Multimaster configuration)
ARLO
Yes
No
Bus Error Event
BERR
Yes
No
BTF
ADSL
SB
AF
STOPF
ARLO
BERR
EVF
INTERRUPT
ITE
*
* EVF can also be set by EV6 or an error from the SR2 register.
ADD10
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