MB86330 Fujitsu Media Devices Limited, MB86330 Datasheet - Page 13

• Manufacturer Part Number: MB86330
• Description: 16-bit Fixed-point DSP
• Manufacturer: Fujitsu Media Devices Limited

• Configuration of the memory space
• Memory space mode
• Memory map for single chip mode
MEMORY SPACE
• Single chip mode (MOD2: 0 = “000”)
The memory space consists of a data memory space and an instruction memory space. The I/O, ARAM,
BRAM, TABLE, and ERAM (external memory) areas are allocated in the data memory space, while the
instruction memory is allocated in the program memory space. The I/O, TABLE, ERAM (external memory),
ARAM and BRAM areas in the data memory space are, however, assigned a particular data bus. The memory
for any two areas can, therefore, be accessed concurrently during one cycle. What memory is accessed is
determined automatically by an address value.
Addresses allocated for the memories, and their maximum size are determined as follows. Select a memory
size to be allocated in this range.
You can select a method for allocating the data memory space and the program memory space by operating
mode. Determine operating mode by mode pins (MOD2, MOD1 and MOD0) as follows.
The program for single chip mode (MOD2: 0 = “000”) is operated by the internal program RAM (which externally
downloads a program). Five areas for I/O, ARAM, BRAM, TABLE and ERAM are allocated on the data memory
space, with the instruction memory allocated on a program memory space completely different from the data
memory space. Although the instruction memory can have an independent address space for 64 kwords,
therefore, you cannot access data in the instruction memory using a program.
MOD2
0
Other than above
MOD1
0000H
1000H
2000H
3000H
7000H
8000H
FFFFH
0
Data memory area
TABLE area
ARAM area
BRAM area
ERAM area
: The hatched area cannot be used by the user.
I/O area
16 bits
MOD0
0
0000H
4000H
4100H
FFFFH
Operating mode
Single chip mode
Instruction memory space
Emulation work area
memory for the user
Internal instruction
Disabled
16 bits
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MB86330
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