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M16C/62 Datasheet(PDF) 525 Page - Renesas Technology Corp |
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M16C/62 Datasheet(HTML) 525 Page - Renesas Technology Corp |
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525 / 621 page  External Buses Mitsubishi microcomputers M16C / 62 Group SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER 510 5.2.2 Chip Selects and Address Bus _______ _______ Chip selects (P44/CS0 through P47/CS3) are output in areas resulting from dividing a 1-M byte memory space into four. To use the chip select, the chip select output must be enabled by setting the chip select control register. Figure 5.2.2 shows addresses in which chip selects become active (“L”). Since the extent of the internal area and the external area in memory expansion mode is different from _______ those in microprocessor mode, there is a difference between areas for which CS0 is output. When an internal ROM/RAM area is being accessed, no chip select is output, and the address bus does not change (the address of the external area that was accessed previously is held). Figure 5.2.2. Addresses in which chip selects turn active (“L”) 0000016 003FF16 0040016 XXXXX16 03FFF16 0400016 07FFF16 0800016 27FFF16 2800016 2FFFF16 3000016 CFFFF16 D000016 YYYYY16 FFFFF16 SFR area Internal RAM area Internal reserved area Internal reserved area Internal ROM area Memory expansion mode Microprocessor mode CS3 0400016 to 07FFF16 (16K) CS2 0800016 to 27FFF16 (128K) CS1 2800016 to 2FFFF16 (32K) CS0 3000016 to CFFFF16 (640K) 3000016 to F7FFF16 (800K) CS3 0400016 to 07FFF16 (16K) CS2 0800016 to 27FFF16 (128K) CS1 2800016 to 2FFFF16 (32K) CS0 3000016 to FFFFF16 (832K) Note 1: This memory maps show an instance in which PM13 is set to 0; but in the case of M30624MG/FG, they show an instance in which PM13 is set to 1. Note 2: This memory map show the address in normal mode. M30622M4 00FFF16 F800016 C000016 053FF16 M30624MG/FG M30620M8 02BFF16 F000016 E800016 017FF16 M30622MA E000016 017FF16 M30622MC M30620MC/EC E000016 02BFF16 M30622M8/E8 F000016 013FF16 Address XXXXX16 Type No. Address YYYYY16 |
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