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參數(shù)資料
| 型號： | ST52X420 |
| 廠商： | 意法半導體 |
| 元件分類： | ADC |
| 英文描述： | 8-BIT INTELLIGENT CONTROLLER UNIT (ICU) Three Timer/PWMs, ADC, WDG |
| 中文描述： | 8位智能控制器病房（ICU）3個定時器/的PWM，ADC的，水分散粒劑 |
| 文件頁數(shù)： | 32/84頁 |
| 文件大?。?/td> | 1274K |
| 代理商： | ST52X420 |
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ST52T410/ST52T420/E420
32/84
Figure 4.6 Example of a sequence of Interrupt requests
Note: The Interrupt priority must be fixed at the
beginning of the main program because at the
RESET
REG_CONF1=’00000000’
generate
erroneous
program execution the interrupt priority can
only be modified with the following procedure:
it
could
During
operations.
STEP 1:
Mask the interrupts by means of a UDGI (or
MDGI) instruction
STEP 2:
Change the REG_CONF 1 values to modify the
interrupt priority
STEP 3:
Reset all the pending interrupt instructions by
means of RINT instructions.
STEP 4:
Unmask the interrupts by means of a UEGI (or
MEGI) instruction
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 transferring program control to a selected
service routine.
When an interrupt occurs the CU executes a JUMP
instruction to the address loaded in the related
location of the Interrupt Vector.
When the execution returns to the original program
it immediately begins following the instruction that
was interrupted.
(*) ST52x420 only
Table 4.4 RINT Instruction code
Peripheral Name
Value
INT_ADC (*)
0
PWM/TIMER 0
1
PWM/TIMER 1
2
PWM/TIMER 2
3
INT_EXT
4
MAIN PROGRAM
5
4
3
2
1
0
PRI2
PRI0
PRI2
PRI1
PRI2
PRI3
PRI4
MAIN PROGRAM
PRIORITY
LEVEL
PRI2
PRI0
PRI4
PRI1
PRI3
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