M38500EAH View Datasheet(PDF) - MITSUBISHI ELECTRIC
Part Name
Description
MFG CO.
M38500EAH Datasheet PDF : 287 Pages
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BEFORE USING THIS MANUAL
This user’s manual consists of the following three chapters. Refer to the chapter appropriate to your conditions,
such as hardware design or software development. Chapter 3 also includes necessary information for
systems development. You must refer to that chapter.
1. Organization
q CHAPTER 1 HARDWARE
This chapter describes features of the microcomputer and operation of each peripheral function.
q CHAPTER 2 APPLICATION
This chapter describes usage and application examples of peripheral functions, based mainly on
setting examples of relevant registers.
q CHAPTER 3 APPENDIX
This chapter includes necessary information for systems development using the microcomputer, such
as the electrical characteristics, the notes, and the list of registers.
✽For the mask ROM confirmation form, the ROM programming confirmation form, and the mark
specifications, refer to the “Renesas Technology Corp.” Homepage (http://www.renesas.com/en/
rom).
2. Structure of register
The figure of each register structure describes its functions, contents at reset, and attributes as follows :
Bits
(Note 2)
Bit attributes
b7 b6 b5 b4 b3 b2 b1 b0
(Note 1)
Contents immediately after reset release
0
CPU mode register (CPUM) [Address : 3B16]
B
Name
Function
0 Processor mode bits
1
2 Stack page selection bit
b1 b0
0 0 : Single-chip mode
01:
1 0 : Not available
11:
0 : 0 page
1 : 1 page
3 Nothing arranged for these bits. These are write disabled
4 bits. When these bits are read out, the contents are “0.”
5 Fix this bit to “0.”
6 Main clock (XIN-XOUT) stop bit
0 : Operating
1 : Stopped
7
Internal system clock selection bit
0 : XIN-XOUT selected
1 : XCIN-XCOUT selected
At reset R W
0
0
0
0
✕
0
✕
1
✽
✽
: Bit in which nothing is arranged
: Bit that is not used for control of the corresponding function
Note 1:. Contents immediately after reset release
0....... “0” at reset release
1....... “1” at reset release
?....... Undefined at reset release
✽.......Contents determined by option at reset release
Note 2: Bit attributes......... The attributes of control register bits are classified into 3 bytes : read-only, write-
only and read and write. In the figure, these attributes are represented as follows :
R....... Read
...... Read enabled
✕.......Read disabled
W......Write
..... Write enabled
✕...... Write disabled
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