M30610SAA-XXXFS Просмотр технического описания (PDF) - Mitsumi

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M30610SAA-XXXFS

Single chip 16-bit CMOS microcomputer. ROM 128K bytes, RAM 10K bytes

Mitsumi 

Memory

Mitsubishi microcomputers

M16C / 61 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Operation of Functional Blocks

The M16C/61 group accommodates certain units in a single chip. These units include ROM and RAM to

store instructions and data and the central processing unit (CPU) to execute arithmetic/logic operations.

Also included are peripheral units such as timers, serial I/O, D-A converter, DMAC, CRC calculation circuit,

A-D converter, and I/O ports.

The following explains each unit.

Memory

Figure 1.4.1 is a memory map of the M16C/61 group. The address space extends the 1M bytes from

address 0000016 to FFFFF16. From FFFFF16 down is ROM. For example, in the M30612M4A-XXXFP,

there is 32K bytes of internal ROM from F800016 to FFFFF16. The vector table for fixed interrupts such as

_______

the reset and NMI are mapped to FFFDC16 to FFFFF16. The starting address of the interrupt routine is

stored here. The address of the vector table for timer interrupts, etc., can be set as desired using the

internal register (INTB). See the section on interrupts for details.

From 0040016 up is RAM. For example, in the M30612M4A-XXXFP, 4K bytes of internal RAM is mapped

to the space from 0040016 to 013FF16. In addition to storing data, the RAM also stores the stack used when

calling subroutines and when interrupts are generated.

The SFR area is mapped to 0000016 to 003FF16. This area accommodates the control registers for periph-

eral devices such as I/O ports, A-D converter, serial I/O, and timers, etc. Any part of the SFR area that is not

occupied is reserved and cannot be used for other purposes.

The special page vector table is mapped to FFE0016 to FFFDB16. If the starting addresses of subroutines

or the destination addresses of jumps are stored here, subroutine call instructions and jump instructions

can be used as 2-byte instructions, reducing the number of program steps.

In memory expansion mode and microprocessor mode, a part of the spaces are reserved and cannot be

used. For example, in the M30612M4A-XXXFP, the following spaces cannot be used.

• The space between 0140016 and 03FFF16

• The space between D000016 and F7FFF16 (When external area do not expand in memory expansion

mode)

Do not expand the external area in single chip mode. A part of internal memory cannot be used depending

on MCU.

0000016

SFR area

For details, see Figure

1.7.1 and Figure 1.7.2

0040016

XXXXX16

0400016

Internal RAM area

Internal reserved

area (Note 1)

External area

Type No.

Address XXXXX16 Address YYYYY16

M30610M8A

02BFF16

F000016

M30610MAA

02BFF16

E800016

M30610MCA/EC

02BFF16

E000016

M30612M4A/E4

013FF16

F800016

M30612M8A

013FF16

F000016

M30612MAA

013FF16

E800016

M30612MCA

017FF16

E000016

D000016

YYYYY16

Internal reserved

area (Note 2)

Internal ROM area

FFFFF16

FFE0016

Special page

vector table

FFFDC16

FFFFF16

Undefined instruction

Overflow

BRK instruction

Address match

Single step

Watchdog timer

DBC

NMI

Reset

Note 1: During memory expansion and microprocessor modes, can not be used.

Note 2: When external area do not expand in memory expansion mode.

Figure 1.4.1. Memory map

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