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參數(shù)資料
| 型號(hào)： | 68HC705PL4B |
| 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(yè)數(shù)： | 29/98頁(yè) |
| 文件大?。?/td> | 1019K |
| 代理商： | 68HC705PL4B |
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April 30, 1998
GENERAL RELEASE SPECIFICATION
MC68HC05PL4
REV 2.0
INTERRUPTS
MOTOROLA
4-5
Figure 4-3. External Interrupt Logic
4.4.2 Miscellaneous Control and Status Register
IRQEN — External Interrupt Request Enable
This read/write bit enables external interrupts. Reset clears the IRQEN bit.
0 =
External interrupt processing disabled. LED/IRQ pin return to
normal LED function
1 =
External interrupt processing enabled. LED/IRQ pin set to IRQ
function
IRQS— External Interrupt Sensitivity
This bit makes the external interrupt inputs level-triggered as well as edge-trig-
gered.
0 =
IRQ negative edge-triggered and low level-triggered.
1 =
IRQ negative edge-triggered only.
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
MICSR
$001C
RESET
R
W
IRQEN
IRQS
TCMPEN
TCAPEN
LED
COPON
POR
0
0
0
0
0
0
0
0
Figure 4-4. Miscellaneous Control and Status Register (MICSR)
Edge and Level Sensitive
IRQS
VDD
LED/IRQ
Power On Reset
External Reset
PH2
BIH,BIL instruction
External Interrupt
Being Serviced
(Read of Vectors)
IRQEN
LED
Q
D
R
Q
D
INTERRUPT
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