參數(shù)資料
型號: MC68HC11D3CFN2
廠商: ABILIS SYSTEMS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 48/138頁
文件大?。?/td> 1047K
代理商: MC68HC11D3CFN2
Interrupt Request (IRQ)
MC68HC711D3 Data Sheet, Rev. 2.1
Freescale Semiconductor
17
Figure 1-5. Oscillator Connections
1.9 Interrupt Request (IRQ)
The IRQ input provides a means of applying asynchronous interrupt requests to the microcontroller unit
(MCU). Either negative edge-sensitive triggering or level-sensitive triggering is program selectable by
using the IRQE bit of the OPTION register. IRQ is always configured to level-sensitive triggering at reset.
While the programmable read-only memory (PROM) is being programmed, this pin provides the chip
enable (CE) signal. To prevent accidental programming of the PROM during reset, an external resistor is
required on IRQ to pull the pin to VDD.
10 M
* Values includes all stray capacitances.
FIRST MCU
EXTAL
XTAL
4 x E
CRYSTAL
MCU
EXTAL
XTAL
4 x E
CMOS-COMPATIBLE
EXTERNAL OSCILLATOR
NC OR
10K–100K
LOAD
25 pF *
SECOND MCU
EXTAL
XTAL
NC OR
10K–100K
LOAD
10 M
MCU
EXTAL
XTAL
4 x E
CRYSTAL
25 pF *
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