參數(shù)資料
型號: MC68HC05K1P
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 MHz, MICROCONTROLLER, PDIP16
封裝: PLASTIC, DIP-16
文件頁數(shù): 98/154頁
文件大?。?/td> 1585K
代理商: MC68HC05K1P
Technical Data
MC68HC05K0 MC68HC05K1 — Rev. 2.0
Interrupts
Technical Data
4.3.2.3 IRQ Status and Control Register
The IRQ status and control register (ISCR), shown in Figure 4-2,
contains an external interrupt mask, an external interrupt flag, and a flag
reset bit. Unused bits read as logic 0s.
IRQE — External Interrupt Request Enable Bit
This read/write bit enables external interrupts. Reset sets the IRQE
bit.
1 = External interrupt processing enabled
0 = External interrupt processing disabled
IRQF — External Interrupt Request Flag
The IRQF bit (IRQ latch) is a clearable, read-only bit that is set when
an external interrupt request is pending. Reset clears the IRQF bit.
1 = Interrupt request pending
0 = No interrupt request pending
These conditions set the IRQF bit:
An external interrupt signal on the IRQ/VPP pin
An external interrupt signal on pin PA3, PA2, PA1, or PA0 if
PA3–PA0 are enabled by mask option to serve as external
interrupt sources
The CPU clears the IRQF bit when fetching the interrupt vector.
Writing to the IRQF bit has no effect. Writing a logic 1 to the IRQR bit
clears the IRQF bit.
Address:
$000A
Bit 7
654321
Bit 0
Read:
IRQE
0
IRQF
0
Write:
IRQR
Reset:
100000
U
0
= Unimplemented
U = Unaffected
Figure 4-2. IRQ Status and Control Register (ISCR)
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相關PDF資料
PDF描述
MC68HC05K0CDW 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDSO16
MC68HC05K0P 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDIP16
MC68HC05K1VDW 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDSO16
MC68HC05K1DW 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDSO16
MC68HC05K1CDW 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDSO16
相關代理商/技術參數(shù)
參數(shù)描述
MC68HC05K1VDW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05K1VP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05K3 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05K3CDW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05K3CP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit