參數(shù)資料
型號(hào)： M37224M3-XXXSP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42
封裝： 0.600 INCH, 1.778 MM PITCH, SHRINK, PLASTIC, DIP-42
文件頁數(shù)： 83/83頁
文件大?。?/td> 901K
代理商： M37224M3-XXXSP
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 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.
000016
00C016
00FF16
013F16
06B316
D00016
SFR area
Not used
FFFF16
FFDE16
FF0016
060016
Interrupt vector area
Not used
1000016
10FFF16
1FFFF16
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 02DF16
Block 2: addresses 02E0 16 to 02FF16
021716
021B16
02C016
02FF16
2 page register
Not used
Fig. 4. Memory Map
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