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FS98O21 Datasheet(PDF) 47 Page - Fortune Semiconductor Corp.

Part # FS98O21
Description  8-bit MCU with 2k program EPROM, 128-byte RAM
PDF  136 Pages
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Manufacturer  FORTUNE [Fortune Semiconductor Corp.]
Direct Link  https://www.ic-fortune.com/eng/index.asp
Logo FORTUNE - Fortune Semiconductor Corp.

FS98O21 Datasheet(HTML) 47 Page - Fortune Semiconductor Corp.

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FS98O21
Rev. 1.7
47/136
Chopper Operation Amplifier Input Control Signal
The OPAMP embedded in FS98O21 has a chopper function to cancel the inverting and non-inverting sides
voltage bias offsets. After the Chopper operation, OPAMP input voltage bias is removed. Users could setup the
S_CH1CK[1:0] to choose the Chopper Control Signal. (Please see Table 5-17, Table 5-18 and Table 5-19)
Table 5-17 CLK selection table
M1_CK
CLK
0
MCK
1
MCK/4
Table 5-18 MCK selection table
M3_CK
M0_CK
MCK
X
0
ICK
0
1
ECK
1
1
ECK/2
Table 5-19 chopper control signal selection table
S_CH1CK [1]
S_CH1CK [0]
Chopper Control Signal
0
0
0
0
1
1
1
0
CLK/500
1
1
CLK/1000



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