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參數資料
| 型號： | ADSP-2189 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| 中文描述： | 無電容，NMOS管，150mA的低壓差穩壓器的反向電流保護 |
| 文件頁數： | 8/32頁 |
| 文件大小： | 244K |
| 代理商： | ADSP-2189 |
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REV. A
ADSP-2189M
–
8
–
Mode D = 1 and in host mode:
IACK
is an open source and
requires an external pull-down, but multiple
IACK
pins can be
wire OR-ed together.
MEMORY ARCHITECTURE
The ADSP-2189M provides a variety of memory and peripheral
interface options. The key functional groups are Program Memory,
Data Memory, Byte Memory and I/O. Refer to the following
figures and tables for PM and DM memory allocations in the
ADSP-2189M.
Program Memory
Program Memory,
Full Memory Mode
is a 24-bit-wide space
for storing both instruction op codes and data. The ADSP-2189M
has 32K words of Program Memory RAM on chip and the
capability of accessing up to two 8K external memory overlay
spaces using the external data bus.
Program Memory,
Host Mode
allows access to all internal
memory. External overlay access is limited by a single external
address line (A0). External program execution is not available in
host mode due to a restricted data bus that is 16-bits wide only.
Table III. PMOVLAY Bits
PMOVLAY
Memory
A13
A12:0
0, 4, 5
1
Internal
External
Overlay 1
Not Applicable Not Applicable
0
13 LSBs of Address
Between 0x2000
and 0x3FFF
13 LSBs of Address
Between 0x2000
and 0x3FFF
2
External
Overlay 2
1
Data Memory
Data Memory,
Full Memory Mode
is a 16-bit-wide space
used for the storage of data variables and for memory-mapped
control registers. The ADSP-2189M has 48K words on Data
Memory RAM on-chip. Part of this space is used by 32 memory-
mapped registers. Support also exists for up to two 8K external
memory overlay spaces through the external data bus. All inter-
nal accesses complete in one cycle. Accesses to external memory
are timed using the wait-states specified by the DWAIT register
and the wait-state mode bit.
ACCESSIBLE WHEN
DMOVLAY = 2
ACCESSIBLE WHEN
DMOVLAY = 1
0 0000–
0 1FFF
0 0000–
0 1FFF
EXTERNAL
32 MEMORY–
MAPPED
REGISTERS
IN8160
WORDS
0 3FFF
0 2000
0 1FFF
0 0000
DATA MEMORY
ADDRESS
INTERNAL
8K INTERNAL
DMOVLAY =
0, 4, 5, 6, 7
EXTEOR
DMOVLAY = 1, 2
0 3FE0
0 3FDF
DATA MEMORY
ACCESSIBLE WHEN
ACCESSIBLE WHEN
0 0000–
0 1FFF
0 0000–
0 1FFF
ACCESSIBLE WHEN
DMOVLAY = 5
ALWAYS
ACCESSIBLE
AT ADDRESS
0 2000 – 0 3FFF
ACCESSIBLE WHEN
DMOVLAY = 0
ACCESSIBLE WHEN
0 0000–
0
1FFF
0 0000
–
0 1FFF
0 0000
–
0 1FFF
Figure 5. Data Memory Map
ACCESSIBLE WHEN
PMOVLAY = 2
ACCESSIBLE WHEN
PMOVLAY = 1
ACCESSIBLE WHEN
PMOVLAY = 5
ALWAYS
ACCESSIBLE
AT ADDRESS
0 0000
–
0 1FFF
ACCESSIBLE WHEN
PMOVLAY = 0
ACCESSIBLE WHEN
PMOVLAY = 4
INTERNAL
EXTERNAL
MEMORY
0 2000
–
0 3FFF
0 2000
–
0 3FFF
0 2000
–
0 3FFF
0 2000
–
0 3FFF
2
0 2000
–
0 3FFF
2
PM (MODE B = 0)
8K INTERNAL
PMOVLAY = 0
8K EXTERNAL
PROGRAM MEMORY
MODE B = 1
ADDRESS
0 3FFF
0 2000
0 1FFF
0 0000
8K INTERNAL
PMOVLAY = 0, 4, 5
OR
8K EXTERNAL
PMOVLAY = 1, 2
0 3FFF
0 2000
0 1FFF
8K INTERNAL
0 0000
PROGRAM MEMORY
MODE B = 0
ADDRESS
ACCESSIBLE WHEN
PMOVLAY = 1
RESERVED
RESERVED
INTERNAL
MEMORY
EXTERNAL
MEMORY
0 2000
–
0 3FFF
0 0000
–
0 1FFF
2
PM (MODE B = 1)
1
RESERVED
1
WHEN MODE B = 1, PMOVLAY MUST BE SET TO 0
2
SEE TABLE III FOR PMOVLAY BITS
ACPMOVLAY = 0
RESERVED
0 0000
–
0 1FFF
2
Figure 4. Program Memory
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| ADSP-2189M | 制造商:AD 制造商全稱:Analog Devices 功能描述:DSP Microcomputer |
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