参数资料
型号: M37274MA-XXXSP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, MICROCONTROLLER, PDIP52
封装: 0.600 INCH, 1.778 MM PITCH, SHRINK, PLASTIC, DIP-52
文件页数: 13/131页
文件大小: 2049K
代理商: M37274MA-XXXSP
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 000016 to 00FF16 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 FF0016 to FFFF16 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
000016
00C016
00FF16
0DF316
SFR1 area
Not used
FFFF16
FFDE16
FF0016
080016
Interrupt vector area
Not used
1080016
1FFFF16
Special page
ROM
(40 K bytes)
RAM for OSD (Note)
(1296 bytes)
RAM
(768 bytes)
Zero page
020016
024816
600016
SFR2 area
Not used
030016
Not used
155FF16
1800016
Not used
1E41F16
1000016
ROM for OSD
(11072 bytes)
043F16
Not used
Note : Refer to Table 15. Contents of OSD RAM.
02C016
02FF16
ROM correction memory
Block 1 : addresses 02C0 16 to 02DF16
Block 2 : addresses 02E0 16 to 02FF16
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