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FS98O251 Datasheet(PDF) 23 Page - Fortune Semiconductor Corp.

Part # FS98O251
Description  8-bit MCU with 8k program EPROM, 256-byte RAM
PDF  142 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.

FS98O251 Datasheet(HTML) 23 Page - Fortune Semiconductor Corp.

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FS98O25
Rev. 1.6
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3.3.1. Special Register Contents after External Reset (Power On Reset) and WDT Reset
Table 3-3 special register reset table
Register
Address
Register
Name
Register Content
External Reset
WDT Reset
04H
STATUS
00u00uuu
uuuu1uuu
0DH
WDTCON
00000000
uuuuuuuu
20H
PT1
00000000
uuuuuuuu
21H
PT1EN
00000000
uuuuuuuu
22H
PT1PU
00000000
uuuuuuuu
23H
AIENB1
00000000
uuuuuuuu
24H
PT2
00000000
uuuuuuuu
25H
PT2EN
00000000
uuuuuuuu
26H
PT2PU
00000000
uuuuuuuu
27H
PT2MR
00000000
uuuuuuuu
28H
PT3
00000000
uuuuuuuu
29H
PT3EN
00000000
uuuuuuuu
2AH
PT3PU
00000000
uuuuuuuu
2BH
PT3MR
00000000
uuuuuuuu
37H
PT2OC
uuu11uuu
uuuuuuuu
57H
I2CCON
0001uuuu
uuuuuuuu
58H
STA
uu0000u0
uuuuuuuu
59H
I2CADD
00000000
uuuuuuuu
5AH
I2CBUF
00000000
uuuuuuuu
3.3.2. IND and FSR Registers
The IND (Indirect Addressing) register is not a physical register, but indirect addressing needs the IND register.
Any instruction using the IND register actually accesses the register pointed by the FSR (File Select Register).
While user reads data from the IND register, the CPU gets the data from the Data Memory at the address
stored in FSR. While user writes the data into IND register, CPU actually saves the data into Data Memory at
the address stored in FSR. Please see Figure 3-2.
Figure 3-2 IND & FSR function description



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