M37273M8 Datasheet, PDF (13/139 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

MITSUBISHI MICROCOMPUTERS
M37273M8–XXXSP, M37273MF–XXXSP
M37273E8SP, M37273EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
8.2 MEMORY
8.2.1 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.
8.2.2 RAM
RAM is used for data storage and for stack area of subroutine calls
and interrupts.
8.2.3 ROM
ROM is used for storing user programs as well as the interrupt vector
area.
8.2.4 OSD RAM
RAM for display is used for specifying the character codes and col-
ors to display.
8.2.5 OSD ROM
ROM for display is used for storing character data.
8.2.6 Interrupt Vector Area
The interrupt vector area contains reset and interrupt vectors.
8.2.7 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.
8.2.8 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.
8.2.9 ROM Correction Memory (RAM)
This is used as the program area for ROM correction.
¡M37273M8-XXXSP, M37273E8SP
RAM
(1152 bytes)
000016
00BF16
00C016
00FF16
010016
01FF16
020016
020F16
030016
032016
SFR1 area
SFR2 area
Not used
05BF16
OSD RAM
(128 bytes)
iSee note j
080016
087F16
OSD ROM
(10K bytes)
140016
3BFF16
Not used
Not used
Not used
Zero page
1000016
ROM correction function
Vector1: address 030016
Vector2: address 032016
Not used
800016
ROM
(32K bytes)
FF0016
FFDE16
Interrupt vector area
FFFF16
Special page
1FFFF16
Note: Refer to Table 8.11.3 OSD RAM.
Fig. 8.2.1 Memory Map (M37273M8-XXXSP, M37273E8SP)
12
Rev. 1.0