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HT85F2270 Datasheet(PDF) 169 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) 169 Page - Holtek Semiconductor Inc

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Rev. 1.00
169 of ��6
�a� 1�� �01�
Standard 8051 8-Bit Flash MCU
HT85F2260/HT85F2270/HT85F2280
VREF
Internal Voltage
Reference Generator
VREFI
VREFIS
�
U
X
VCCA�
VREFDS
�
U
X
VREFAS
ADC Voltage
Reference
DAC Voltage
Reference
VCCA�
0
0
1
1
A/D
Enable
D/A
Enable
Enable/Disable
Control
OR
Voltage Reference Generator Block Diagram
The A/D converter and DAC reference voltage is selected by the VREFIS, VREFAS and VREFDS
control bits. When the VREFIS bit is enabled the internal voltage reference will be routed to pin
VREF and can be selected for use by the A/D converter or DAC, using the VREFAS and VREFDS
bits.



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