tmp89fm42a TOSHIBA Semiconductor CORPORATION, tmp89fm42a Datasheet - Page 32

• Manufacturer Part Number: tmp89fm42a
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA000
2.2.2
2.2.2.1
2.2.2.2
Data area
The data area stores the data to be accessed as sources and destinations of transfer and calculation instructions.
The SFR, the RAM, the BOOTROM and the FLASH are mapped in the data area.
in the data area after reset release.
Note:Only the first 2 Kbytes of the BOOTROM are mapped in the memory map, except in the serial PROM
The SFR is mapped to 0x0000 to 0x003F (SFR1), 0x0F00 to 0x0FFF (SFR2) and 0x0E40 to 0x0EFF (SFR3)
The RAM is mapped to 0x0040 to 0x083F in the data area after reset release.
SFR
RAM
Note:Don't access the reserved SFR.
Note:The contents of the RAM become unstable when the power is turned on and immediately after a reset
mode.
is released. To execute the program by using the RAM, transfer the program to be executed in the
initialization routine.
Figure 2-2 Memory Map in the Data Area
0x0EFF
0x0FFF
0xFFFF
0x003F
0x083F
0x0E40
0x0F00
0x17FF
0x7FFF
0x0000
0x0040
0x1000
0x1800
0x8000
Immediately after re-
(32768 bytes)
(2048 bytes)
0xFF is read
0xFF is read
(192 bytes)
(256 bytes)
set release
(64 bytes)
SFR1
SFR3
SFR2
Flash
RAM
Page 13
ROM is mapped in
When the BOOT-
(32768 bytes)
the data area
(2048 bytes)
0xFF is read
(2048 bytes)
0xFF is read
BOOTROM
(192 bytes)
(256 bytes)
(64 bytes)
SFR1
SFR3
SFR2
Flash
RAM
TMP89FM42A