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HD64F2149YV 数据表(PDF) 163 Page - Renesas Technology Corp

部件名 HD64F2149YV
功能描述  Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series
PDF  1075 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

HD64F2149YV 数据表(HTML) 163 Page - Renesas Technology Corp

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Section 5 Interrupt Controller
Rev. 3.00 Jan 18, 2006 page 135 of 1044
REJ09B0280-0300
5.6.2
Instructions that Disable Interrupts
Instructions that disable interrupts are LDC, ANDC, ORC, and XORC. After any of these
instructions is executed, all interrupts except NMI are disabled and the next instruction is always
executed. When the I bit or UI bit is set by one of these instructions, the new value becomes valid
two states after execution of the instruction ends.
5.6.3
Interrupts during Execution of EEPMOV Instruction
Interrupt operation differs between the EEPMOV.B instruction and the EEPMOV.W instruction.
With the EEPMOV.B instruction, an interrupt request (including NMI) issued during the transfer
is not accepted until the move is completed.
With the EEPMOV.W instruction, if an interrupt request is issued during the transfer, interrupt
exception handling starts at a break in the transfer cycle. The PC value saved on the stack in this
case is the address of the next instruction.
Therefore, if an interrupt is generated during execution of an EEPMOV.W instruction, the
following coding should be used.
L1: EEPMOV.W
MOV.W
R4,R4
BNE
L1



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