參數(shù)資料
型號: M37224M3
廠商: Mitsubishi Electric Corporation
英文描述: Single Chip 8 Bits Microcomputer(8位單片機(jī))
中文描述: 單芯片8位單片機(jī)(8位單片機(jī))
文件頁數(shù): 9/83頁
文件大小: 901K
代理商: M37224M3
M37224M3-XXXSP
MITSUBISHI MICROCOMPUTERS
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
9
MEMORY
Special Function Register (SFR) Area
The special function register (SFR) area in the zero page contains
control registers such as I/O ports and timers.
RAM
RAM is used for data storage and for stack area of subroutine calls
and interrupts.
ROM
ROM is used for storing user programs as well as the interrupt vector
area.
RAM for Display
RAM for display is used for specifying the character codes and col-
ors to display.
ROM for Display
ROM for display is used for storing character data.
Interrupt Vector Area
The interrupt vector area contains reset and interrupt vectors.
Zero Page
The 256 bytes from addresses 0000
16
to 00FF
16
are called the zero
page area. The internal RAM and the special function registers (SFR)
are allocated to this area.
The zero page addressing mode can be used to specify memory and
register addresses in the zero page area. Access to this area with
only 2 bytes is possible in the zero page addressing mode.
Special Page
The 256 bytes from addresses FF00
16
to FFFF
16
are called the spe-
cial page area. The special page addressing mode can be used to
specify memory addresses in the special page area. Access to this
area with only 2 bytes is possible in the special page addressing
mode.
ROM Correction Memory (RAM)
This is used as the program area for ROM correction.
0000
16
00C0
16
00FF
16
013F
16
06B3
16
D000
16
SFR area
Not used
Not used
FFFF
16
FFDE
16
FF00
16
0600
16
Interrupt vector area
Not used
10000
16
10FFF
16
1FFFF
16
ROM
for display
(4K bytes)
Special page
ROM
(12K bytes)
RAM
for display
(Note)
(80 bytes)
Zero page
RAM
(256 bytes)
Note:
Refer to Table 8. Contents of CRT display RAM.
ROM correction memory (RAM)
Block 1: addresses 02C0
16
to 02DF
16
Block 2: addresses 02E0
16
to 02FF
16
0217
16
021B
16
02C0
16
02FF
16
2 page register
Not used
Not used
Fig. 4. Memory Map
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