參數(shù)資料
型號： M37274MA
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)： 11/131頁
文件大小： 2049K
代理商： M37274MA
11
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37274MA-XXXSP
PRELIMINARY
Notice: This is not a final specification.
Some paramentic limits are subject to change.
MITSUBISHI MICROCOMPUTERS
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 OSD
RAM for display is used for specifying the character codes and col-
ors to display.
ROM for OSD
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.
Fig. 4. Memory map
0000
16
00C0
16
00FF
16
0DF3
16
SFR1 area
Not used
FFFF
16
FFDE
16
FF00
16
0800
16
Interrupt vector area
Not used
10800
16
1FFFF
16
Special page
ROM
(40 K bytes)
RAM for OSD (Note)
(1296 bytes)
RAM
(768 bytes)
Zero page
0200
16
0248
16
6000
16
SFR2 area
Not used
0300
16
Not used
155FF
16
18000
16
Not used
1E41F
16
10000
16
ROM for OSD
(11072 bytes)
043F
16
Not used
Note :
Refer to Table 15. Contents of OSD RAM.
02C0
16
02FF
16
ROM correction memory
Block 1 : addresses 02C0
16
to 02DF
16
Block 2 : addresses 02E0
16
to 02FF
16
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