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HT85F2270 Datasheet(PDF) 61 Page - Holtek Semiconductor Inc

Part # HT85F2270
Description  Standard 8051 8-Bit Flash MCU
PDF  226 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT85F2270 Datasheet(HTML) 61 Page - Holtek Semiconductor Inc

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Rev. 1.00
61 of ��6
�a� 1�� �01�
Standard 8051 8-Bit Flash MCU
HT85F2260/HT85F2270/HT85F2280
CPU clock
PLL
X1~X8
LSOSEL
PLLSRC
External
Cr�stal
Oscillator
HXT
Internal RC
Oscillator
HIRC
Internal RC
Oscillator
LIRC
External Cr�stal
Oscillator
LXT
Watchdog
Timer
WDTCS
��k
SCKS[1:0]
�
U
X
�
U
X
�
U
X
�
U
X
Time Base
PLL�[�:0]
fSYS
�
U
X
TBCK[1:0]
fWDT
fTB
IDL bit
- enable/disable CPU clock
PD bit
- enable/disable
selected oscillators
HXTEN bit
enable/disable
HIRCEN bit
enable/disable
fSYS/16
fSYS/4 or fSYS/1�8
System Clock Configurations



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