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參數資料
| 型號： | FM8P54 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | EPROM/ROM-Based 8-Bit Microcontroller Series |
| 中文描述： | 存儲器/基于ROM的8位微控制器系列 |
| 文件頁數： | 6/50頁 |
| 文件大小： | 368K |
| 代理商： | FM8P54 |
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FM8P54/56
Rev1.21 May 31, 2005
P.6/FM8P54/56
FEELING
TECHNOLOGY
2.0 FUNCTIONAL DESCRIPTIONS
2.1 Operational Registers
2.1.1 INDF (Indirect Addressing Register)
Address
Name
00h (r/w)
INDF
The INDF Register is not a physical register. Any instruction accessing the INDF register can actually access the
register pointed by FSR Register. Reading the INDF register itself indirectly (FSR=”0”) will read 00h. Writing to the
INDF register indirectly results in a no-operation (although status bits may be affected).
The bits 5-0 of FSR register are used to select up to 64 registers (address: 00h ~ 3Fh).
EXAMPLE 2.1: INDIRECT ADDRESSING
Register file 38 contains the value 10h
Register file 39 contains the value 0Ah
Load the value 38 into the FSR Register
A read of the INDF Register will return the value of 10h
Increment the value of the FSR Register by one (@FSR=39h)
A read of the INDR register now will return the value of 0Ah.
FIGURE 2.1: Direct/Indirect Addressing
Direct Addressing
5
from opcode
0
location select
00h
3Fh
B7
B6
B5
B4
B3
B2
B1
B0
Uses contents of FSR to address data memory (not a physical register)
Indirect Addressing
5 from FSR register 0
location select
addressing INDF register
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相關代理商/技術參數 |
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| FM8P56 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EPROM/ROM-Based 8-Bit Microcontroller Series |
| FM8P56E | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EPROM/ROM-Based 8-Bit Microcontroller Series |
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