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UPD780138 Datasheet(PDF) 7 Page - NEC

No. de Pieza. UPD780138
Descripción  8-Bit Single-Chip Microcontrollers
Descarga  558 Pages
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Fabricante  NEC [NEC]
Página de inicio  http://www.nec.com/
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UPD780138 Datasheet(HTML) 7 Page - NEC

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User’s Manual U16228EJ2V0UD
7
How to Read This Manual
It is assumed that the readers of this manual have general knowledge of electrical
engineering, logic circuits, and microcontrollers.
• When using this manual as the manual for (A) grade products, (A1) grade products,
and (A2) grade products:
→ Only the quality grade differs between standard products and (A), (A1), and (A2)
grade products. Read the part number as follows.
µPD780131 → µPD780131(A), 780131(A1), 780131(A2)
µPD780132 → µPD780132(A), 780132(A1), 780132(A2)
µPD780133 → µPD780133(A), 780133(A1), 780133(A2)
µPD780134 → µPD780134(A), 780134(A1), 780134(A2)
µPD780136 → µPD780136(A), 780136(A1), 780136(A2)
µPD780138 → µPD780138(A), 780138(A1), 780138(A2)
µPD78F0134 → µPD78F0134(A), 78F0134(A1)
µPD78F0138 → µPD78F0138(A), 78F0138(A1)
• To gain a general understanding of functions:
→ Read this manual in the order of the CONTENTS. The mark
shows major
revised points.
• How to interpret the register format:
→ For a bit number enclosed in brackets, the bit name is defined as a reserved word
in the assembler, and is already defined in the header file named sfrbit.h in the C
compiler.
• To check the details of a register when you know the register name.
→ Refer to APPENDIX C REGISTER INDEX.
• To know details of the 78K/0 Series instructions.
→ Refer to the separate document 78K/0 Series Instructions User’s Manual
(U12326E).
Caution
Examples in this manual employ the “standard” quality grade for
general electronics.
When using examples in this manual for the
“special” quality grade, review the quality grade of each part and/or
circuit actually used.
Conventions
Data significance:
Higher digits on the left and lower digits on the right
Active low representations:
××× (overscore over pin and signal name)
Note:
Footnote for item marked with Note in the text.
Caution:
Information requiring particular attention
Remark:
Supplementary information
Numerical representations: Binary
...
×××× or ××××B
Decimal
...
××××
Hexadecimal
...
××××H


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