adsp-21462 Analog Devices, Inc., adsp-21462 Datasheet - Page 7

• Manufacturer Part Number: adsp-21462
• Description: Sharc Processor
• Manufacturer: Analog Devices, Inc.

Preliminary Technical Data
to four separate devices to coexist, supporting any desired com-
bination of synchronous and asynchronous device types. Non
DDR2 DRAM external memory address space is shown in
Table
External Memory Execution
In the ADSP-2146x, the program sequencer can execute code
directly from external memory bank 0 (SRAM, as well as DDR2
DRAM). This allows more options to a user in terms of code
Table 3. ADSP-21465W/ADSP-21467 Internal Memory Space
IOP Registers 0x0000 0000–0x0003 FFFF
Long Word (64 bits)
BLOCK 0 ROM
0x0004 0000–0x0004 7FFF
Reserved
0x0004 8000–0x0004 8FFF
BLOCK 0 RAM
0x0004 9000–0x0004 EFFF
Reserved
0x0004 F000–0x0004 FFFF
BLOCK 1 ROM
0x0005 0000–0x0005 7FFF
Reserved
0x0005 8000–0x0005 8FFF
BLOCK 1 RAM
0x0005 9000–0x0005 EFFF
Reserved
0x0005 F000–0x0005 FFFF
BLOCK 2 RAM
0x0006 0000–0x0006 3FFF
Reserved
0x0006 4000–0x0006 FFFF
BLOCK 3 RAM
0x0007 0000–0x0007 3FFF
Reserved
0x0007 4000–0x0007 FFFF
5.
Extended Precision Normal or
Instruction Word (48 bits)
BLOCK 0 ROM
0x0008 0000–0x0008 AAA9
Reserved
0x0009 0000–0x0009 1FFF
BLOCK 0 RAM
0x0008 C000-0x0009 3FFF
Reserved
0x0009 E000–0x0009 FFFF
BLOCK 1 ROM
Reserved
BLOCK 1 RAM
0x000A C000-0x000B 3FFF
Reserved
0x000B E000–0x000B FFFF
BLOCK 2 RAM
0x000C 0000–0x000C 5554
Reserved
0x000C 8000–0x000D FFFF
BLOCK 3 RAM
0x000E 0000–0x000E 5554
Reserved
0x000E 8000–0x000F FFFF
0x000A 0000–0x000A AAA9
0x000B 000–0x000B 1FFF
Rev. PrC | Page 7 of 62 | January 2009
ADSP-21462/ADSP-21465/ADSP-21467/ADSP-21469
Normal Word (32 bits)
BLOCK 0 ROM
0x0008 0000–0x0008 FFFF
Reserved
0x0009 0000–0x0009 1FFF
BLOCK 0 RAM
0x0009 2000-0x0009 DFFF
Reserved
0x0009 E000–0x0009 FFFF
BLOCK 1 ROM
0x000A 0000–0x000A FFFF
Reserved
0x000B 0000–0x000B 1FFF
BLOCK 1 RAM
0x000B 2000-0x000B DFFF
Reserved
0x000B E000–0x000B FFFF
BLOCK 2 RAM
0x000C 0000-0x000C 7FFF
Reserved
0x000C 8000–0x000D FFFF
BLOCK 3 RAM
0x000E 0000–0x000E 7FFF
Reserved
0x000E 8000–0x000F FFFF
and data storage. With external execution, programs run at
slower speeds since 48-bit instructions are fetched in parts from
a 16-bit external bus coupled with the inherent latency of fetch-
ing instructions from DDR2 DRAM. VISA mode and SIMD
mode accesses are supported for DDR2 space.
Short Word (16 bits)
BLOCK 0 ROM
0x0010 0000–0x0011 FFFF
Reserved
0x0012 0000–0x0012 3FFF
BLOCK 0 RAM
0x0012 4000–0x0013 BFFF
Reserved
0x0013 C000–0x0013 FFFF
BLOCK 1 ROM
0x0014 0000-0x0015 FFFF
Reserved
0x0016 0000-0x0016 3FFF
BLOCK 1 RAM
0x0016 4000-0x0017 BFFF
Reserved
0x0017 C000–0x0017 FFFF
BLOCK 2 RAM
0x0018 0000–0x0018 FFFF
Reserved
0x0019 0000–0x001B FFFF
BLOCK 3 RAM
0x001C 0000–0x001C FFFF
Reserved
0x001D 0000–0x001F FFFF