參數(shù)資料
型號: MC68HC05T7B
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP56
封裝: SDIP-56
文件頁數(shù): 40/109頁
文件大?。?/td> 9008K
代理商: MC68HC05T7B
Technical Data
MC68HC705KJ1MC68HRC705KJ1MC68HLC705KJ1 — Rev. 3.0
30
Pin Descriptions
MOTOROLA
Pin Descriptions
2.3.2.3 RC Oscillator
2.3.2.4 External Clock
An external clock from another CMOS-compatible device can be
connected to the OSC1 input, with the OSC2 input not connected, as
shown in Figure 2-7. This configuration is possible regardless of
whether the crystal/ceramic resonator or the RC oscillator is enabled.
Figure 2-7. External Clock Connections
2.3.3 RESET
Applying a logic 0 to the RESET pin forces the MCU to a known startup
state. An internal reset also pulls the RESET pin low. An internal resistor
to VDD pulls the RESET pin high. A steering diode between the RESET
and VDD pins discharges any RESET pin voltage when power is
removed from the MCU. The RESET pin contains an internal Schmitt
trigger to improve its noise immunity as an input. Refer to Section 5.
Resets and Interrupts for more information.
MCU
EXTERNAL
CMOS CLOCK
OSC
1
OSC
2
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