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ST10F272Z2 Datasheet(PDF) 57 Page - STMicroelectronics

Part # ST10F272Z2
Description  16-bit MCU with 256 Kbyte Flash memory and 20 Kbyte RAM
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST10F272Z2 Datasheet(HTML) 57 Page - STMicroelectronics

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ST10F272Z2
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 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 9.
X-Interrupt basic structure
The Table 30 summarizes the mapping of the different interrupt sources which shares the
four X-interrupt vectors.
Table 30.
X-Interrupt detailed mapping
XP0INT
XP1INT
XP2INT
XP3INT
CAN1 Interrupt
xx
CAN2 Interrupt
xx
I2C Receive
xxx
I2C Transmit
xxx
I2C Error
x
SSC1 Receive
xxx
SSC1 Transmit
xxx
SSC1 Error
x
ASC1 Receive
xxx
ASC1 Transmit
xxx
ASC1 Transmit Buffer
xxx
XIRxSEL[7:0] (x = 0, 1, 2, 3)
XIRxSEL[15:8] (x = 0, 1, 2, 3)
XPxIC.XPxIR (x = 0, 1, 2, 3)
7
0
15
8
IT Source 7
IT Source 6
IT Source 5
IT Source 4
IT Source 3
IT Source 2
IT Source 1
IT Source 0
Enable[7:0]
Flag[7:0]


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