M16C/62 Group DATASHEET

Bus ControlMitsubishi microcomputersM16C / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTERTable 1.12.2. External areas specified by the chip select signals(A product having an internal RAM of more than 15K bytes and a ROM of more than 192K bytes)Memory spaceexpansion modeNormal mode(PM15,14=0,0)Processor modeMemory expansion modeChip select signalCS0 CS1 CS2 CS3When PM13=03000016 to CFFFF16(640K bytes)When PM13=13000016 to BFFFF16(576K bytes)Specified address rangeExpansionmode 1(PM15,14=1,0)Microprocessor modeMemory expansion modeMicroprocessor mode3000016 to FFFFF16(816K bytes)When PM13=00400016 to CFFFF16(816K bytes)When PM13=10600016 to BFFFF16(744K bytes)When PM13=00400016 to FFFFF16(1008K bytes)When PM13=10600016 to FFFFF16(1000K bytes)2800016 to2FFFF16(32K bytes)0800016 to27FFF16(128K bytes)When PM13=00400016 to07FFF16(16K bytes)When PM13=10600016 to07FFF16(8K bytes)Expansionmode 2(PM15,14=1,1)Memory expansion modeMicroprocessor mode4000016 to BFFFF16(512K bytes X 7+256K bytes) 2800016 to4000016 to FFFFF16(512K bytes X 8)3FFFF16(96K bytes)Chip select control registerb7 b6 b5 b4 b3 b2 b1 b0Symbol Address When resetCSR 000816 0116Bit symbolCS0CS1CS2CS3CS0WCS1WCS2WCS3WBit nameCS0 output enable bitCS1 output enable bitCS2 output enable bitCS3 output enable bitCS0 wait bitCS1 wait bitCS2 wait bitCS3 wait bitFunction0 : Chip select output disabled(Normal port pin)1 : Chip select output enabled0 : Wait state inserted1 : No wait stateR WFigure 1.12.1. Chip select control register34