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FM8PE581M Datasheet(PDF) 8 Page - Feeling Technology Corp.

Part # FM8PE581M
Description  OTP-Based 8-Bit Microcontroller
Download  87 Pages
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Manufacturer  FEELING [Feeling Technology Corp.]
Direct Link  http://www.feeling-tech.com.tw/
Logo FEELING - Feeling Technology Corp.

FM8PE581M Datasheet(HTML) 8 Page - Feeling Technology Corp.

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FM8PE581M
Web site: http://www.feeling-tech.com.tw
Rev1.00.006 Dec 01, 2016
Page 8 of 87, FM8PE581M
FEELING
TECHNOLOGY
2.0
FUNCTIONAL DESCRIPTIONS
2.1
Operational Registers
2.1.1
INDF (Indirect Addressing Register)
Read/Write-POR
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
Address
Name
B7
B6
B5
B4
B3
B2
B1
B0
0x000
INDF
Uses contents of FSRH and FSRL to address data memory (not a physical register)
Legend: x = unknown, more bits default state, please refer to Table 2.8.
The INDF Register is not a physical register. Any instruction accessing the INDF register can actually access the
register pointed by FSRH and FSRL Register. Reading the INDF register itself indirectly (FSRH and FSRL=”0x00”)
will read 0x00. Writing to the INDF register indirectly results in a no-operation (although status bits may be affected).
Example 2.1: INDIRECT ADDRESSING
Register file 0x148 contains the value 0x10
Register file 0x149 contains the value 0x0A
Load the value 0x148 into the FSRH and FSRL Register
A read of the INDF Register will return the value of 0x10
Increment the value of the FSRL Register by one (@FSRH and FSRL=0x149)
A read of the INDF register now will return the value of 0x0A.
Figure 2.1: Direct/Indirect Addressing for FM8PE581M
location select
addressing INDF register
location select
0x1FF
0x000
Direct Addressing
From opcode
8
0
Indirect Addressing
From FSRH/L register
8
0
7


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