M38041F6HKP datasheet(4/387 Pages) RENESAS

4 / 387 page

BEFORE USING THIS USER’S 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.

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.

2. Structure of Register

The figure of each register structure describes its functions, contents at reset, and attributes as follows:

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 :

: Bit in which nothing is arranged

Name

Functions

At reset

Contents immediately after reset release

Bit attributes

(Note 1)

0 0 : Single-chip mode

0 1 :

1 0 :

1 1 :

Processor mode bits

Stack page selection bit

Nothing arranged for these bits. These are write disabled

bits. When these bits are read out, the contents are “0.”

Fix this bit to “0.

”Main clock division ratio selection

bits

Not available

0 : 0 page

1 : 1 page

0 0 :

φ = XIN/2 (High-speed mode)

0 1 :

φ = XIN/8 (Middle-speed mode)

1 0 :

φ = XIN/8 (Middle-speed mode)

1 1 :

φ = XIN (Double-speed mode)

: Bit that is not used for control of the corresponding function

Notes 1: Contents immediately after reset release

0 •••••• “0” at reset release

1 •••••• “1” at reset release

Undefined •••••• Undefined or reset release

✻ ••••••Contents determined by option at reset release

R••••••Read

••••••Read enabled

✕••••••Read disabled

W••••••Write

••••••Write enabled

✕ ••••••Write disabled

(Note 2)

CPU mode register (CPUM) [Address : 003B16]

Bits

b7 b6

3. Supplementary

For details of related development tools and documents, refer to web page “3804 Group” on our website

(http://www.renesas.com/eng/products/mpumcu/8bit/38000/index.html).

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