tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 23
tmp89fm42
Manufacturer Part Number
tmp89fm42
Description
8 Bit Microcontroller
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP89FM42.pdf
(408 pages)
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RA001
2. CPU Core
2.1 Configuration
2.2 Memory space
2.2.1 Code area
and a data area to be accessed as sources and destinations of transfer and calculation instructions.
The CPU core consists of a CPU, a system clock controller and a reset circuit.
This chapter describes the CPU core address space, the system clock controller and the reset circuit.
The 870/C1 CPU memory space consists of a code area to be accessed as instruction operation codes and operands
Both the code and data areas have independent 64-Kbyte address spaces.
Note: Only the first 2 Kbytes of the BOOTROM are mapped in the memory map, except in the serial PROM mode.
tables.
The code area stores operation codes, operands, vector tables for vector call instructions and interrupt vector
The RAM, the BOOTROM and the Flash are mapped in the code area.
0xFFCC
0xFFBF
0xFFFF
0x17FF
0x7FFF
0xFFA0
0x003F
0x083F
0x0000
0x0040
0x1000
0x1800
0x8000
Vector table for vec-
Immediately after re-
tor call instructions
(0xFF) is fetched.
SWI instruction
Interrupt vector
(32768 bytes)
set release
(32 bytes)
(52 bytes)
Figure 2-1 Memory Map in the Code Area
Flash
table
Vector table for vec-
mapped in the code
tor call instructions
(0xFF) is fetched.
(0xFF) is fetched.
When the RAM is
SWI instruction
SWI instruction
Interrupt vector
(32768 bytes)
(2048 bytes)
(32 bytes)
(52 bytes)
Flash
RAM
table
area
Page 9
Vector table for vec-
mapped in the code
tor call instructions
(0xFF) is fetched.
SWI instruction
Interrupt vector
BOOTROM is
(32768 bytes)
(2048 bytes)
BOOTROM
(32 bytes)
(52 bytes)
When the
Flash
table
area
Vector table for vec-
When the RAM and
mapped in the code
the BOOTROM are
tor call instructions
(0xFF) is fetched.
(0xFF) is fetched.
SWI instruction
SWI instruction
Interrupt vector
(32768 bytes)
(2048 bytes)
(2048 bytes)
BOOTROM
(32 bytes)
(52 bytes)
Flash
RAM
table
area
TMP89FM42
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