MITSUBISHI MICROCOMPUTERS
7470/7471 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MEMORY
• Interrupt Vector Area
• Special Function Register (SFR) Area
The special function register (SFR) area contains the registers
relating to functions such as I/O ports and timers.
• RAM
The interrupt vector area is for storing jump destination ad-
dresses used at reset or when an interrupt is generated.
• Zero Page
Zero page addressing mode is useful because it enables access
to this area with fewer instruction cycles.
RAM is used for data storage as well as a stack area.
• ROM
• Special Page
ROM is used for storing user programs as well as the interrupt
vector area.
Special page addressing mode is useful because it enables ac-
cess to this area with fewer instruction cycles.
000016
RAM (128 bytes)
for
M37470M2
M37471M2
RAM (192 bytes)
for
M37470M4/E4
M37470M8/E8
M37471M4/E4
M37471M8/E8
007F16
00BF16
Not used
SFR area
Zero page
00FF16
010016
RAM (192 bytes)
for
M37470M8/E8
M37471M8/E8
01BF16
Not used
C00016
E00016
F00016
ROM
(16K bytes)
for
M37470M8/E8
M37471M8/E8
FF0016
FFEA16
ROM
(8K bytes)
for
M37470M4/E8
M37471M4/E8
ROM
(4K bytes)
for
M37470M2
M37471M2
Special page
Interrupt vector area
FFFF16
Fig. 2 Memory map
9
ETC [ ETC ]
