參數(shù)資料
型號: MC68HC05E5DW
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝: SOIC-28
文件頁數(shù): 67/140頁
文件大?。?/td> 847K
代理商: MC68HC05E5DW
NON-DISCLOSURE
AGREEMENT
REQUIRED
Interrupts
General Release Specification
MC68HC05E5 Rev. 1.0
32
Interrupts
MOTOROLA
Unlike RESET, hardware interrupts do not cause the current instruction
execution to be halted, but are considered pending until the current
instruction is complete. The current instruction is the one already fetched
and being operated on.
When the current instruction is complete, the processor checks all
pending hardware interrupts. If interrupts are not masked (CCR I bit
clear) and the corresponding interrupt enable bit is set, the processor
proceeds with interrupt processing; otherwise, the next instruction is
fetched and executed.
If both an external interrupt and a timer interrupt are pending at the end
of an instruction execution, the external interrupt is serviced first. The
SWI is executed the same as any other instruction, regardless of the I-bit
state.
Table 4-1. Vector Address for Interrupts and Reset
Register
Flag
Name
Interrupts
CPU
Interrupt
Vector
Address
N/A
Reset
RESET
$1FFE–$1FFF
N/A
Software
SWI
$1FFC–$1FFD
N/A
External Interrupt
IRQ
$1FFA–$1FFB
TCSR
TOF
Timer Overow
TIMER
$1FF8–$1FF9
N/A
RTIF
Real-Time Interrupt
TIMER
$1FF8–$1FF9
CPICSR
CPIF
Custom Periodic Interrupt
CPI
$1FF6–$1FF7
SSR
SF
Synchronous Serial Interrupt
SSI
$1FF4–$1FF5
MSR
MIF
M-Bus Interrupt
M Bus
$1FF2–$1FF3
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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