M37280MF Datasheet, PDF (13/178 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

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MITSUBISHI MICROCOMPUTERS
M37280MF–XXXSP, M37280MK–XXXSP
M37280EKSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
12.2 MEMORY
12.2.1 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.
12.2.2 RAM
RAM is used for data storage and for stack area of subroutine calls
and interrupts.
12.2.3 ROM
The M37280MF-XXXSP has 60K-byte program area. The M37280MK
-XXXSP has 56K-byte program area and 24K-byte data-dedicated
area. For the M37280EKSP, the two area (60K, 24K + 56K) can be
swithed each other by setting the bank control register.
12.2.4 OSD RAM
RAM for display is used for specifying the character codes and col-
ors to display.
12.2.5 OSD ROM
ROM for display is used for storing character data.
12.2.6 Interrupt Vector Area
The interrupt vector area contains reset and interrupt vectors.
12.2.7 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.
12.2.8 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.
12.2.9 ROM Correction Memory (RAM)
This is used as the program area for ROM correction.
000016
RAM
(1472 bytes)
for
M37280MK-XXXSP
and M37280EKSP
RAM
(1024 bytes)
for
M37280MF-
XXXSP
00BF16
00C016
00FF16
010016
020016
025816
OSD RAM (SPRITE)
(120 bytes)
(See note 1)
02C016
02FF16
030016
053F16
06FF16
070016
07A716
OSD RAM (character) ₀₈₀₀₁₆
(1536 bytes)
(See note 2)
0FFF16
100016
SFR1 area
SFR2 area
Not used
Not used
Not used
Zero page
1000016
1080016
Not used
OSD ROM
(character font)
(20400 bytes)
ROM correction memory (64 bytes)
Block 1 : addresses 02C016 to 02DF16
Block 2 : addresses 02E016 to 02FF16
157FF16
1800016
OSD ROM
(color dot font)
(9672 bytes)
1ACFF16
Not used
Not used
ROM
(60K bytes)
FF0016
FFDE16
Interrupt vector area
FFFF16
Special page
1B00016
Expansion ROM
(20K bytes)
for
M37280MK-XXXSP
and M37280EKSP
1C00016
1D00016
1E00016
1F00016
1FFFF16
Bank 11
Bank 12
Bank 13
Bank 14
Bank 15
Notes 1: Refer to Table 12.11.3 OSD RAM (SPRITE).
2: Refer to Tables 12.11.4 and 2.11.5 OSD RAM (character).
Fig. 12.2.1 Memory Map
Rev. 1.0
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