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M38203M4-XXXHP Datasheet(PDF) 5 Page - Mitsubishi Electric Semiconductor |
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M38203M4-XXXHP Datasheet(HTML) 5 Page - Mitsubishi Electric Semiconductor |
5 / 344 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, operation of each peripheral function and electric characteristics. q CHAPTER 2 APPLICATION This chapter describes usage and application examples of peripheral functions, based mainly on setting examples of related registers. q CHAPTER 3 APPENDIX This chapter includes precautions for systems development using the microcomputer, a list of control registers, the masking confirmation forms (mask ROM version), ROM programming confirmation forms (One Time PROM version) and mark specification forms which are to be submitted when ordering. 2. Structure of register The figure of each register structure describes its functions, contents at reset, and attributes as follows : 1 0 : f(XIN)/2 (high-speed mode) 2: Bit attributes••••••The attributes of control register bits are classified into 3 types : read-only, write-only and read and write. In the figure, these attributes are represented as follows : : Bit in which nothing is allocated Name Functions At reset RW B 0 1 2 3 0 0 0 1 7 b0 b1 b2 b3 b4 b5 b6 b7 Values immediately after reset release Bit attributes (Note 1) Processor mode bits Stack page selection bit Fix this bit to “1.” Internal system clock selection bit 00: Single-chip mode 01: 10: 11: Not available b1b0 0 : 0 page 1 : 1 page 0 : XIN-XOUT selected (middle-/high-speed mode) 1 : XCIN-XCOUT selected (low-speed mode) : Bit that is not used for control of the corresponding function 1 Notes 1: Values immediately after reset release 0••••••“0” at reset release 1••••••“1” at reset release ?••••••Undefined or reset release (Note 2) 0 CPU mode register (CPUM) [Address:3B 16] Bits ••••••Read enabled ••••••Read disabled ••••••Fixed to “0” ••••••Fixed to “1” ! 0 1 1 : f(XIN)/8 (middle-speed mode) 5 6 0 Main clock division ratio selection bit 1 : Stopped Main clock (XIN–XOUT) stop bit 0 ! 0 : Oscillating Port XC switch bit 0 : I/O port 1 : XCIN, XCOUT 11 R••••••Read ••••••Write enabled ••••••Write disabled ••••••Only “0” write enabled ••••••Fix to “0” ••••••Fix to “1” ! V 0 1 W••••••Write 4 0 : f(XIN)/2 (high-speed mode) |
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