參數(shù)資料
型號: M306H3MC-XXXFP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP116
封裝: 20 X 20 MM, 0.65 MM PITCH, PLASTIC, LQFP-116
文件頁數(shù): 101/135頁
文件大?。?/td> 2583K
代理商: M306H3MC-XXXFP
Rev.1.00
2004.03.23
page 68 of 320
M306H3MC-XXXFP/FCFP
Figure 2.7.7. Operation of Saving Register
(2) SP contains odd number
[SP]
(Odd)
[SP] – 1 (Even)
[SP] – 2(Odd)
[SP] – 3 (Even)
[SP] – 4(Odd)
[SP] – 5 (Even)
Address
Sequence in which order
registers are saved
(2)
(1)
Finished saving registers
in four operations.
(3)
(4)
(1) SP contains even number
[SP]
(Even)
[SP] – 1(Odd)
[SP] – 2 (Even)
[SP] – 3(Odd)
[SP] – 4 (Even)
[SP] – 5 (Odd)
Note: [SP] denotes the initial value of the SP when interrupt request is acknowledged.
After registers are saved, the SP content is [SP] minus 4.
Address
PCM
Stack
FLGL
PCL
Sequence in which order
registers are saved
(2) Saved simultaneously,
all 16 bits
(1) Saved simultaneously,
all 16 bits
Finished saving registers
in two operations.
PCM
Stack
FLGL
PCL
Saved, 8 bits at a time
FLGH
PCH
FLGH
PCH
The operation of saving registers carried out in the interrupt sequence is dependent on whether the
SP(Note), at the time of acceptance of an interrupt request, is even or odd. If the stack pointer (Note) is
even, the FLG register and the PC are saved, 16 bits at a time. If odd, they are saved in two steps, 8 bits
at a time. Figure 2.7.7 shows the operation of the saving registers.
Note: When any INT instruction in software numbers 32 to 63 has been executed, this is the SP indicated
by the U flag. Otherwise, it is the ISP.
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