ST52T301 Datasheet, PDF (26/100 Pages) STMicroelectronics – 8-Bit OTP/EPROM DuaLogic] MCUs WITH ADC, UART, TIMER, TRIAC & PWM DRIVER

ST52T301/E301
i.e. LDCF 15, 201 (REG_CONF15=11001001)
define the following priority levels:
Level 1: INT_SCI(SCI Code: 01)
Level 2: INT_TIMER(TIMER Code: 10)
Level 3: INT_ADC(ADC Code: 00)
Level 4: INT_TRIAC(TRIAC Code: 11)
When a source provides an Interrupt request, and
the request processing is also enabled, the CU
changes the normal sequential flow of a program
by transfering programcontrol to a selectedservice
routine.
Whenan interrupt occurs the CU executes a JUMP
instruction to the address loaded in the related
location of the Interrupt Vector
Whenthe executionreturns to the original program,
it begins immediately following the interrupted
instruction.
4.6 Interrupt RESET
An eventually pending interrupts can be reset with
the instruction RINT inti which resets the i-th
interrupt
Table 4.3. Configuration Register 15 Description
Bit Name
0, 1 INT1
2, 3 INT2
4, 5 INT3
6, 7 INT4
Value
Peripheral
Code
Peripheral
Code
Peripheral
Code
Peripheral
Code
High
Level
Medium-High
Medium-Low
Low
Figure 4.6. Example of a Sequence of Interrupt Requests
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