參數(shù)資料
型號(hào)： M30281F8HP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP64
封裝： 10 X 10 MM, 0.50 MM PITCH, PLASTIC, LQFP-64
文件頁(yè)數(shù)： 7/28頁(yè)
文件大?。?/td> 211K
代理商： M30281F8HP
M16C/28 Group
Under development Preliminary specification
Specifications in this manual are tentative and subject to change.
3. Memory
Rev.0.40 2004.06.15
page 15 of 26
REJ03B0026-0040Z
3. Memory
Figure 3.1 is a memory map of the M16C/28 group. The linear address space of 1M bytes extends from
address 0000016 to FFFFF16. From FFFFF16 down is ROM. For example, in the M30280F8HP,there are
64 Kbytes of internal ROM from F000016 to FFFFF16.
The vector table for fixed interrupts, such as Reset and NMI, is mapped from 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 interrupt table
register(INTB). See the section on interrupts for details.
From 0040016 up is RAM. For example, in the M30280FAHP, 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.
These devices also contain two blocks of Flash ROM as Data Flash memory to store data. These two
blocks of 2K bytes are located from 0F00016 to 0FFFF16 on all versions.
The SFR area is mapped from 0000016 to 003FF16. This area accommodates the control registers for
peripheral 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 allocated to the address from FFE0016 to FFFDB16. This vector is used by
the JMPS or JSRS instruction. For details, refer to the "M16C/60 and M16C/20 Series Software Manual".
Figure 3.1. Memory Map
0000016
XXXXX16
FFFFF16
0040016
YYYYY16
Internal ROM area
(program area)
SFR area
Internal RAM area
FFE0016
FFFDC16
FFFFF16
Undefined instruction
Overflow
BRK instruction
Address match
Single step
Watchdog timer
Reset
Special page
vector table
DBC
RESERVED
Internal ROM area
(data area)
RESERVED
0F00016
XXXXX16
YYYYY16
Internal RAM area
Internal ROM area
Memory size
013FF16
023FF16
F400016
F000016
4K byte
8K byte
48K byte
64K byte
Memory size
E800016
96K byte
Note 1 : The block A (2K bytes) and block B (2K bytes) are shown
(only flash memory)
Note 2 : When using the masked ROM version, write nothing to
internal ROM area.
(Note1)
0FFFF16
NMI
(Note2)
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