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參數(shù)資料
型號(hào)： MC68HCL05C8A
廠商： Motorola, Inc.
英文描述： 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述： 8位微控制器單元（MCU）。（8位微控制器）
文件頁數(shù)： 39/156頁
文件大小： 755K
代理商： MC68HCL05C8A
Interrupts
External Interrupt (IRQ)
MC68HC05C8A
—
Rev. 3.0
General Release Specification
MOTOROLA
Interrupts
39
L
G
R
4.5 External Interrupt (IRQ)
If the interrupt mask bit (I bit) of the CCR is set, all maskable interrupts
(internal and external) are disabled. Clearing the I bit enables interrupts.
The interrupt request is latched immediately following the falling edge of
IRQ. It is then synchronized internally and serviced as specified by the
contents of $1FFA and $1FFB.
When any of the port B pullups are enabled, that pin becomes an
additional external interrupt source which is coupled to theIRQ pin logic.
It follows the same edge/edge-level selection that the IRQ pin has. See
Figure 7-1. Port B Pullup Option
.
Either a level-sensitive and edge-sensitive trigger, or an edge-sensitive-
only trigger operation is selectable by mask option.
NOTE:
The internal interrupt latch is cleared in the first part of the interrupt
service routine; therefore, one external interrupt pulse could be latched
and serviced as soon as the I bit is cleared.
4.6 Timer Interrupt
Three different timer interrupt flags cause a timer interrupt whenever
they are set and enabled. The interrupt flags are in the timer status
register (TSR), and the enable bits are in the timer control register
(TCR). Any of these interrupts will vector to the same interrupt service
routine, located at the address specified by the contents of memory
locations $1FF8 and $1FF9.
4.7 Serial Communications Interrupt (SCI)
Five different SCI interrupt flags cause an SCI interrupt whenever they
are set and enabled. The interrupt flags are in the SCI status register
(SCSR), and the enable bits are in the SCI control register 2 (SCCR2).
Any of these interrupts will vector to the same interrupt service routine,
located at the address specified by the contents of memory locations
$1FF6 and $1FF7.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HCP11A1CFN3 功能描述:8位微控制器 -MCU 8-bit HCMOS single chip MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
MC68HCP11A1FN 制造商:MOTORALA 功能描述:
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