参数资料
型号: ST72621L4T1
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44
封装: TQFP-44
文件页数: 97/134页
文件大小: 815K
代理商: ST72621L4T1
ST7262
65/134
SERIAL PERIPHERAL INTERFACE (Cont’d)
10.4.6 Low Power Modes
10.4.7 Interrupts
Note: The SPI 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 interrupt mask in the CC
register is reset (RIM instruction).
Mode
Description
WAIT
No effect on SPI.
SPI interrupt events cause the device to exit from WAIT mode.
HALT
SPI registers are frozen.
In HALT mode, the SPI is inactive. SPI operation resumes when the MCU is woken up by an interrupt with
“exit from HALT mode” capability. The data received is subsequently read from the SPIDR register when the
software is running (interrupt vector fetching). If several data are received before the wake-up event, then an
overrun error is generated. This error can be detected after the fetch of the interrupt routine that woke up the
device.
Interrupt Event
Event
Flag
Enable
Control
Bit
Exit
from
Wait
Exit
from
Halt
SPI End of Transfer Event
SPIF
SPIE
Yes
Master Mode Fault Event
MODF
Yes
No
Overrun Error
OVR
Yes
No
1
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