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參數(shù)資料
| 型號： | M306H7MG-XXXFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100 |
| 文件頁數(shù)： | 70/115頁 |
| 文件大?。?/td> | 3146K |
| 代理商： | M306H7MG-XXXFP |
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Rev.2.10
Oct 25, 2006
Page 58 of 326
REJ03B0152-0210
M306H7MG-XXXFP/MC-XXXFP/FGFP
6. INTERRUPTS
6.17
NMI Interrupt
An NMI interrupt is generated when input on the NMI pin changes state from high to low. The NMI interrupt is a
non-maskable interrupt.
The input level of this NMI interrupt input pin can be read by accessing the P8 register’s P8_5 bit.
This pin cannot be used as an input port.
6.18
Address Match Interrupt
An address match interrupt request is generated immediately before executing the instruction at the address
indicated by the RMADi register (i = 0 to 3). Set the start address of any instruction in the RMADi register. Use the
AIER register’s AIER0 and AIER1 bits and the AIER2 register’s AIER20 and AIER21 bits to enable or disable the
interrupt. Note that the address match interrupt is unaffected by the I flag and IPL.
For address match interrupts, the value of the PC that is saved to the stack area varies depending on the instruction
being executed (refer to “Saving Registers”).
(The value of the PC that is saved to the stack area is not the correct return address.) Therefore, follow one of the
methods described below to return from the address match interrupt.
Rewrite the content of the stack and then use the REIT instruction to return.
Restore the stack to its previous state before the interrupt request was accepted by using the POP or similar other
instruction and then use a jump instruction to return.
Table 6.6 shows the value of the PC that is saved to the stack area when an address match interrupt request is
accepted.
Note that when using the external bus in 8 bits width, no address match interrupts can be used for externa areas.
Figure 6.11 shows the AIER, AIER2, and RMAD0 to RMAD3 registers.
Table 6.6
Instruction Just Before Execution and Address Stored in Stack When There Occurs
Interrupts
Table 6.7
Relationship Between Address Match Interrupt Sources and Associated Registers
16-bit op-code instruction
Instruction shown below among 8-bit operation code instructions
ADD.B:S
#IMM8,dest
SUB.B:S
#IMM8,dest
AND.B:S
#IMM8,dest
OR.B:S
#IMM8,dest
MOV.B:S
#IMM8,dest
STZ.B:S
#IMM8,dest
STNZ.B:S
#IMM8,dest
STZX.B:S
#IMM81,#IMM82,dest
CMP.B:S
#IMM8,dest
PUSHM
src
POPM dest
JMPS
#IMM8
JSRS
#IMM8
MOV.B:S
#IMM,dest (However, dest=A0 or A1)
Instructions other than the above
Instruction at the address indicated by the RMADi register
Value of the PC that is
saved to the stack area
The address
indicated by the
RMADi register +2
The address
indicated by the
RMADi register +1
Value of the PC that is saved to the stack area : Refer to “Saving Registers”.
Address match interrupt sources Address match interrupt enable bit
Address match interrupt register
Address match interrupt 0
AIER0
RMAD0
Address match interrupt 1
AIER1
RMAD1
Address match interrupt 2
AIER20
RMAD2
Address match interrupt 3
AIER21
RMAD3
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