ST10F276 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'ST10F276' PDF : 229 Pages View PDF
Interrupt system
ST10F276
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 masked through the enable bits), allowing an effective software management also in
absence of the possibility to serve the related interrupt request: a periodic polling of the flag
bits may be implemented inside the user application.
Figure 16. X-Interrupt basic structure
7
0
Flag[7:0]
XIRxSEL[7:0] (x = 0, 1, 2, 3)
IT Source 7
IT Source 6
IT Source 5
IT Source 4
IT Source 3
XPxIC.XPxIR (x = 0, 1, 2, 3)
IT Source 2
IT Source 1
IT Source 0
Enable[7:0]
XIRxSEL[15:8] (x = 0, 1, 2, 3)
15
8
The Table 41 summarizes the mapping of the different interrupt sources which shares the
four X-interrupt vectors.
Table 41. X-Interrupt detailed mapping
XP0INT
CAN1 Interrupt
x
CAN2 Interrupt
I2C Receive
x
I2C Transmit
x
I2C Error
SSC1 Receive
x
SSC1 Transmit
x
SSC1 Error
ASC1 Receive
x
ASC1 Transmit
x
ASC1 Transmit Buffer
x
XP1INT
x
x
x
x
x
x
x
x
XP2INT
x
x
x
x
x
x
x
XP3INT
x
x
x
x
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