參數(shù)資料
型號(hào)： MC68HC705C9AP
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP40
封裝： PLASTIC, DIP-40
文件頁數(shù)： 106/177頁
文件大?。?/td> 1941K
代理商： MC68HC705C9AP
General Description
Advance Information
MC68HC705C9A — Rev. 4.0
34
General Description
MOTOROLA
1.7.3 IRQ
This interrupt pin has an option that provides two different choices of
interrupt triggering sensitivity. The IRQ pin contains an internal Schmitt
trigger as part of its input to improve noise immunity. Refer to
Section 4. Interrupts for more detail.
1.7.4 OSC1 andOSC2
These pins provide control input for an on-chip clock oscillator circuit. A
crystal connected to these pins provides a system clock. The internal
frequency is one-half the crystal frequency.
1.7.5 RESET
As an input pin, this active low RESET pin is used to reset the MCU to a
known startup state by pulling RESET low. As an output pin, when in
MC68HC05C9A mode only, the RESET pin indicates that an internal
MCU reset has occurred. The RESET pin contains an internal Schmitt
trigger as part of its input to improve noise immunity. Refer to
Section 5. Resets for more detail.
1.7.6 TCAP
This pin controls the input capture feature for the on-chip programmable
timer. The TCAP pin contains an internal Schmitt trigger as part of its
input to improve noise immunity. Refer to Section 8. Capture/Compare
Timer for more detail.
1.7.7 TCMP
The TCMP pin provides an output for the output compare feature of the
on-chip programmable timer. Refer to Section 8. Capture/Compare
Timer for more detail.
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