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M38B71M1 Datasheet(PDF) 13 Page - Renesas Technology Corp |
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M38B71M1 Datasheet(HTML) 13 Page - Renesas Technology Corp |
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13 / 110 page 
38B7 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER MITSUBISHI MICROCOMPUTERS 12 MEMORY Special Function Register (SFR) Area The special function register (SFR) area contains control registers for I/O ports, timers and other functions. RAM RAM is used for data storage and for stack area of subroutine calls and interrupts. ROM The first 128 bytes and the last 2 bytes of ROM are reserved for device testing, and the other areas are user areas for storing pro- grams. Interrupt Vector Area The interrupt vector area contains reset and interrupt vectors. Zero Page The zero page addressing mode can be used to specify memory and register addresses in the zero page area. Access to this area with only 2 bytes is possible in the zero page addressing mode. Special Page The special page addressing mode can be used to specify memory addresses in the special page area. Access to this area with only 2 bytes is possible in the special page addressing mode. Fig. 8 Memory map diagram 010016 000016 004016 044016 FF0016 FFDC16 FFFE16 FFFF16 192 256 384 512 640 768 896 1024 1536 2048 XXXX16 00FF16 013F16 01BF16 023F16 02BF16 033F16 03BF16 043F16 063F16 083F16 4096 8192 12288 16384 20480 24576 28672 32768 36864 40960 45056 49152 53248 57344 61440 F00016 E00016 D00016 C00016 B00016 A00016 900016 800016 700016 600016 500016 400016 300016 200016 100016 F08016 E08016 D08016 C08016 B08016 A08016 908016 808016 708016 608016 508016 408016 308016 208016 108016 YYYY16 ZZZZ16 RAM ROM 0EE016 0F0016 0EFF16 0FFF16 0EDF16 0E0016 Reserved area SFR area 1 Not used (Note) Interrupt vector area ROM area Reserved ROM area (common ROM area,128 bytes) Zero page Special page RAM area RAM size (byte) Address XXXX16 ROM size (byte) Address YYYY16 Reserved ROM area Address ZZZZ16 SFR area 2 RAM area for Serial I/O automatic transfer Note: When 1024 bytes or more are used as RAM area, this area can be used. RAM area for FLD automatic display |
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