M30620FCAFP datasheet(541/615 Pages) RENESAS

541 / 615 page

External Buses

Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

2-224

4.2.2 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 4.2.2 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 4.2.2. 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 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 : These memory maps show an instance in which PM13 is set to 0; but in the case of products in which the internal

RAM and the internal ROM are expanded to over 15 Kbytes and 192 Kbytes, respectively, they show an instance

in which PM13 is set to 1.

Address YYYYY16

3K bytes

00FFF16

053FF16

017FF16

013FF16

Address XXXXX16

ROM size

02BFF16

5K bytes

4K bytes

10K bytes

20K bytes

RAM size

32K bytes

C000016

E800016

F000016

E000016

96K bytes

64K bytes

128K bytes

256K bytes

F800016

M30620FCAFP Datasheet(PDF) 541 Page - Renesas Technology Corp

M30620FCAFP Datasheet(HTML) 541 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL