st10f273m STMicroelectronics, st10f273m Datasheet - Page 59

• Manufacturer Part Number: st10f273m
• Description: 16-bit Mcu With 512 Kbyte Flash Memory And 36 Kbyte Ram
• Manufacturer: STMicroelectronics

ST10F273M
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 10. X-Interrupt basic structure
Table 31
interrupt vectors.
Table 31.
CAN1 Interrupt
CAN2 Interrupt
I2C Receive
I2C Transmit
I2C Error
SSC1 Receive
SSC1 Transmit
SSC1 Error
ASC1 Receive
ASC1 Transmit
ASC1 Transmit Buffer
ASC1 Error
PLL Unlock / OWD
PWM1 Channel 3...0
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 detailed mapping
15
7
Enable[7:0]
Flag[7:0]
8
0
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
x
Interrupt system
XP3INT
x
x
x
x
x
x
x
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