M16C/62 Group DATASHEET

Memory Space Expansion FunctionsMitsubishi microcomputersM16C / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTER(2) Expansion mode 1In this mode, the memory space can be expanded by 176K bytes in addition to that in normal mode.Figure 1.8.2 shows the memory location and chip select area in expansion mode 1._______ _______ _______In accessing data in expansion mode 1, CS3, CS2, and CS1 go active in the area from 0400016 through_______2FFFF16; in fetching a program, CS0 goes active. That is, the address space is expanded by using the________ _______ _______area from 0400016 through 2FFFF16 (176K bytes) appropriately for accessing data (CS3, CS2, CS1)_______and fetching a program (CS0).Expansion mode 1 (memory space = 1.2M bytes for PM15 = 1, PM14 = 0)00000160040016XXXXX160800016D000016YYYYY16FFFFF16Memoryexpansion modeSFR areaInternal RAMareaInternal area reservedExternal area040001628000163000016Internal area reservedInternal ROMareaMicroprocessormodeSFR areaInternal RAMareaInternal area reservedExternalareaCS3(16K bytes)CS2(128 Kbytes)CS1(32K bytes)CS0Memory expansionmode:816K bytesMicroprocessor mode:1008K bytes0400016to2FFFF163000016toFFFFF16176K bytes= the extent of memory expandedCS0:active in fetching a programCS1, CS2, CS3:active in accessing dataCS0:active both in fetching a programand in accessing dataType No. Address XXXXX16 Address YYYYY16M30622M4 00FFF16 F800016M30620M8 02BFF16 F000016M30620MA02BFF16E800016M30620MC/EC 02BFF16E000016M30622M8/E8013FF16F000016M30622MA017FF16E800016M30622MC017FF16E000016M30624MG/FG 053FF16C000016Note 1: These memory maps show an instance in which PM13 is set to 0; but in the case of M30624MG/FG, they show aninstance in which PM13 is set to 1.Note 2: The memory maps in single-chip mode are omitted.Figure 1.8.2. Memory location and chip select area in expansion mode 122