參數(shù)資料
型號(hào)： MC68HC705X4DWR2
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 2.2 MHz, MICROCONTROLLER, PDSO28
封裝： PLASTIC, SOIC-28
文件頁數(shù)： 87/168頁
文件大?。?/td> 656K
代理商： MC68HC705X4DWR2
Modes of Operation and Pin Descriptions
Pin descriptions
MC68HC05X4 Rev 1.0
MOTOROLA
Modes of Operation and Pin Descriptions
25
13-modes
Ceramic
resonator
A ceramic resonator may be used instead of the crystal in cost-sensitive
applications. The circuit in Figure 8(a) is recommended when using a
ceramic resonator. The manufacturer of the particular ceramic resonator
being considered should be consulted for specific information. This
option is recommended only for applications that operate at an external
clock frequency of 8MHz or less. Any application requiring an external
operating frequency greater that 8MHz should use either a crystal
oscillator or an external CMOS compatible clock source.
External clock
An external clock should be applied to the OSC1 input with the OSC2 pin
not connected, as shown in Figure 8(c). The tOXOVspecification does not
apply when using an external clock input. The equivalent specification of
the external clock source should be used in lieu of tOXOV.
Figure 8. Oscillator connections
OSC1
OSC2
MCU
COSC2
COSC1
OSC1
OSC2
MCU
NC
External
clock
OSC1
OSC2
RS
C1
L
C0
(c) External clock source connections
(b) Crystal equivalent circuit
(a) Crystal/ceramic resonator
oscillator connections
相關(guān)PDF資料
PDF描述
MC68HC05X4CDWR2 8-BIT, MROM, 2.2 MHz, MICROCONTROLLER, PDSO28
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