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H8S2245 bảng dữ liệu(PDF) 159 Page - Renesas Technology Corp

tên linh kiện H8S2245
Giải thích chi tiết về linh kiện  Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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Section 5 Interrupt Controller
Rev.3.00 Mar. 26, 2007 Page 117 of 772
REJ09B0355-0300
Figure 5.4 shows a block diagram of the priority decision circuit.
ICR
UI
I
Default priority
determination
Vector
number
Interrupt acceptance
control and
3-level mask control
Interrupt
source
Interrupt control modes
0 and 1
Figure 5.4 Block Diagram of Interrupt Control Operation
(1) Interrupt Acceptance Control and 3-Level Control
Interrupt acceptance control and 3-level mask control is performed by means of the I and UI bits
in CCR, and ICR (control level).
Table 5.6 shows the interrupts selected in each interrupt control mode.
Table 5.6
Interrupts Selected in Each Interrupt Control Mode
Interrupt Mask Bits
Interrupt Control Mode
I
UI
Selected Interrupts
00
*
All interrupts (control level 1 has priority)
1
*
NMI interrupts
10
*
All interrupts (control level 1 has priority)
1
0
NMI and control level 1 interrupts
1
NMI interrupts
Legend:
*: Don't care



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