參數(shù)資料
型號(hào): MC68HC705J1ADWR2
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, PDSO20
封裝: SOIC-20
文件頁數(shù): 52/162頁
文件大?。?/td> 1517K
代理商: MC68HC705J1ADWR2
MC68HSR705J1A
RC Oscillator Connections (No External Resistor)
MC68HC705J1A — Rev. 3.0
Technical Data
MOTOROLA
MC68HSR705J1A
145
C.5 RC Oscillator Connections (No External Resistor)
For maximum cost reduction, the RC oscillator mask connections shown
in Figure C-2 allow the on-chip oscillator to be driven with no external
components. This can be accomplished by programming the oscillator
internal resistor (OSCRES) bit in the mask option register to a logic 1.
When programming the OSCRES bit for the MC68HSR705J1A, an
internal resistor is selected which yields typical internal oscillator
frequencies as shown in Figure C-3. The internal resistance for this
device is different than the resistance of the selectable internal resistor
on the MC68HC705J1A and the MC68HSC705J1A devices.
NOTE:
This option is not available on the ROM version of this device
(MC68HC05J1A).
Figure C-2. RC Oscillator Connections (No External Resistor)
MCU
VDD
VSS
C1
C2
OSC1
OSC2
OSC1
OSC2
R
EXTERNAL CONNECTIONS LEFT OPEN
相關(guān)PDF資料
PDF描述
MC68HSR705J1ADWR2 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO20
MC68HRC705J1ACDWR2 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO20
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