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參數(shù)資料
| 型號(hào)： | UPD78322GJ |
| 廠商： | NEC Corp. |
| 英文描述： | 16/8-BIT SINGLE-CHIP MICROCONTROLLER |
| 中文描述： | 16/8-BIT單片機(jī) |
| 文件頁(yè)數(shù)： | 42/88頁(yè) |
| 文件大?。?/td> | 479K |
| 代理商： | UPD78322GJ |
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42
μ
PD78320, 78322
4.
INTERRUPT FUNCTIONS
4.1
OVERVIEW
In the
μ
PD78322, various interrupt requests generated externally or from the on-chip peripheral hardware are handled
in the following three servicing modes.
Interrupt requests are classified into the following three groups.
Nonmaskable interrupt requests
Maskable interrupt requests
Interrupt requests by software
Figure 4-1 shows the maskable interrupt request servicing modes. Table 4-1 gives a listing of interrupt factors which can
be serviced.
Figure 4-1. Interrupt Request Servicing Modes
Handled by Vectored Interrupt Servicing
Interrupt Request
Handled by Context Switching
Handled by Macro Service
× ×
MK = 1 (Interrupt Masked)
Vectored Interrupt and Macro Service Reserved
× ×
MK = 0 (Interrupt Unmasked)
× ×
ISM = 0 (Vectored Interrupt Servicing Mode)
DI
Vectored Interrupt Servicing Reserved
EI
× ×
CSE = 0
× ×
CSE = 1
× ×
ISM = 1 (Macro Service Processing Mode)
Macro Service Processing Executed
Vectored Interrupt Servicing Executed
Context Switching Executed
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