ST10F272M-4Q3 STMICROELECTRONICS [STMicroelectronics], ST10F272M-4Q3 Datasheet - Page 54

• Manufacturer Part Number: ST10F272M-4Q3
• Description: 16-bit MCU with 256 Kbyte Flash memory and 20 Kbyte RAM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Interrupt system
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available vector. If more than one source is enabled to issue the request, the service routine
will have to take care to identify the real event to be serviced. This can easily be done by
checking the flag bits (Byte Low of XIRxSEL register). Note that the flag bits can also
provide information about events which are not currently serviced by the interrupt controller
(since they are masked through the enable bits), allowing an effective software management
even if the related interrupt request cannot be served: A periodic polling of the flag bits may
be implemented inside the user application.
Figure 9.
Table 30
interrupt vectors.
Table 30.
CAN1 Interrupt
CAN2 Interrupt
I2C Receive
I2C Transmit
I2C Error
SSC1 Receive
SSC1 Transmit
SSC1 Error
ASC1 Receive
ASC1 Transmit
ASC1 Transmit Buffer
IT Source 7
IT Source 6
IT Source 5
IT Source 4
IT Source 3
IT Source 2
IT Source 1
IT Source 0
summarizes the mapping of the different interrupt sources which shares the four X-
Interrupt source
X-Interrupt basic structure
X-Interrupt detailed mapping
15
7
Enable[7:0]
Flag[7:0]
0
8
XIRxSEL[7:0] (x = 0, 1, 2, 3)
XIRxSEL[15:8] (x = 0, 1, 2, 3)
XP0INT
x
x
x
x
x
x
x
x
XP1INT
x
x
x
x
x
x
x
x
XPxIC.XPxIR (x = 0, 1, 2, 3)
XP2INT
x
x
x
x
x
x
x
ST10F272M
XP3INT
x
x
x
x