M30621ECGP MITSUBISHI [Mitsubishi Electric Semiconductor], M30621ECGP Datasheet - Page 10

• Manufacturer Part Number: M30621ECGP
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Memory
10
Operation of Functional Blocks
Memory
Figure 1.4.1. Memory map
The M16C/62(80-pin version) 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 calcu-
lation circuit, A-D converter, and I/O ports.
The following explains each unit.
Figure 1.4.1 is a memory map of the M16C/62 group. The address space extends the 1M bytes from
address 00000
is 128K bytes of internal ROM from E0000
reset and NMI are mapped to FFFDC
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 00400
the space from 00400
calling subroutines and when interrupts are generated.
The SFR area is mapped to 00000
eral devices such as I/O ports, A-D converter, serial I/O, and timers, etc. Figures 1.7.1 to 1.7.3 are location
of peripheral unit control registers. 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 FFE00
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.
M30623MA
M30623MC
M30621MC/EC
M30621MA
M30623M4
M30623M8
M30621M8
M30625MG/FG
Type No.
_______
16
up is RAM. For example, in the M30623MC-XXXFP, 5K bytes of internal RAM is mapped to
16
to FFFFF
XXXXX
00FFF
013FF
017FF
017FF
02BFF
02BFF
02BFF
053FF
Address
16
16
16
16
16
16
16
16
16
16
to 017FF
16
YYYYY
. From FFFFF
E8000
E0000
E0000
E8000
C0000
Address
F8000
F0000
F0000
16
16
16
16
16
16
16
16
16
16
16
. In addition to storing data, the RAM also stores the stack used when
to 003FF
16
Note: Set PM13 to “1” in M30625MG/FG. Otherwise set PM13 to “0”.
00000
XXXXX
YYYYY
FFFFF
00400
to FFFFF
16
16
16
16
16
16
16
to FFFFF
down is ROM. For example, in the M30623MC-XXXFP, there
16
For details, see Figures
. This area accommodates the control registers for periph-
Internal ROM area
Internal RAM area
16
16
1.7.1 to 1.7.3
. The starting address of the interrupt routine is stored
Reserved
SFR area
to FFFDB
area
16
. The vector table for fixed interrupts such as the
16
. If the starting addresses of subroutines
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
FFFFF
FFE00
FFFDC
M16C / 62 Group (80-pin)
16
16
16
Undefined instruction
BRK instruction
Watchdog timer
Special page
Address match
Mitsubishi microcomputers
vector table
Single step
Overflow
Reset
DBC
NMI