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| 型号： | EVAL-ADUC7122QSPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 35/96页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR ADUC7122 |
| 设计资源： | EVAL-ADUC7122 Schematic ADUC7122 Gerber Files ADUC7122 BOM |
| 标准包装： | 1 |
| 系列： | MicroConverter® ADuC7xxx |
| 类型： | MCU |
| 适用于相关产品： | ADUC7122 |
| 所含物品： | 板 |
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ADuC7122
Rev. 0 | Page 40 of 96
Table 57. FEE0PRO and FEE0HID MMR Bit Designations
Bit
Description
31
Read protection.
Cleared by the user to protect Block 0.
Set by the user to allow reading of Block 0.
30:0
Write protection for Page 123 to Page 120, for Page 119 to Page 116, and for Page 3 to Page 0.
Cleared by the user to protect the pages in writing.
Set by the user to allow writing the pages.
Table 58. FEE1PRO and FEE1HID MMR Bit Designations
Bit
Description
31
Read protection.
Cleared by the user to protect Block 1.
Set by the user to allow reading of Block 1.
30
Write protection for Page 127 to Page 120.
Cleared by the user to protect the pages in writing.
Set by the user to allow writing the pages.
29:0
Write protection for Page 119 to Page 116 and for Page 3 to Page 0.
Cleared by the user to protect the pages in writing.
Set by the user to allow writing the pages.
EXECUTION TIME FROM SRAM AND FLASH/EE
This section describes SRAM and Flash/EE access times during
execution of applications where execution time is critical.
Execution from SRAM
Fetching instructions from SRAM takes one clock cycle because
the access time of the SRAM is 2 ns and a clock cycle is 22 ns
minimum. However, if the instruction involves reading or
writing data to memory, one extra cycle must be added if the
data is in SRAM (or three cycles if the data is in Flash/EE), one
cycle to execute the instruction and two cycles to obtain the
32-bit data from Flash/EE. A control flow instruction, such as a
branch instruction, takes one cycle to fetch, but it also takes
two cycles to fill the pipeline with the new instructions.
Execution from Flash/EE
Because the Flash/EE width is 16 bits and access time for 16-bit
words is 23 ns, execution from Flash/EE cannot be completed in
one cycle (contrary to a SRAM fetch, which can be completed in
a single cycle when CD bits = 0). Dependent on the instruction,
some dead times may be required before accessing data for any
value of CD bits.
In ARM mode, where instructions are 32 bits, two cycles are
needed to fetch any instruction when CD = 0. In Thumb mode,
where instructions are 16 bits, one cycle is needed to fetch any
instruction.
Timing is identical in both modes when executing instructions
that involve using Flash/EE for data memory. If the instruction
to be executed is a control flow instruction, an extra cycle is
needed to decode the new address of the program counter and
then four cycles are needed to fill the pipeline. A data processing
instruction involving only core registers does not require any
extra clock cycles, but if it involves data in Flash/EE, an extra
clock cycle is needed to decode the address of the data and two
cycles to obtain the 32-bit data from Flash/EE. An extra cycle
must also be added before fetching another instruction. Data
transfer instructions are more complex and are summarized in
Table 59. Execution Cycles in ARM/Thumb Mode
Instructions
Fetch
Cycles
Dead
Time
Data Access
Dead
Time
LD
2/1
1
2
1
LDH
2/1
1
LDM/PUSH
2/1
N
2 × N
N
STR
2/1
1
2 × 20 μs
1
STRH
2/1
1
20 μs
1
STRM/POP
2/1
N
2 × N × 20 μs
N
With 1 < N ≤ 16, N is the number of bytes of data to load or
store in the multiple load/store instruction. The SWAP instruction
combines an LD and STR instruction with only one fetch,
giving a total of eight cycles plus 40 μs.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EVAL-ADUC7124QSPZ | 功能描述:BOARD EVALUATION FOR ADUC7124 RoHS:是 类别:编程器，开发系统 >> 通用嵌入式开发板和套件（MCU、DSP、FPGA、CPLD等） 系列:MicroConverter® ADuC7xxx 标准包装:1 系列:PICDEM™ 类型:MCU 适用于相关产品:PIC10F206，PIC16F690，PIC16F819 所含物品:板，线缆，元件，CD，PICkit 编程器 产品目录页面:659 (CN2011-ZH PDF) |
| EVAL-ADUC7126QSPZ | 功能描述:BOARD EVALUATION FOR ADUC7126 RoHS:是 类别:编程器，开发系统 >> 通用嵌入式开发板和套件（MCU、DSP、FPGA、CPLD等） 系列:MicroConverter® ADuC7xxx 标准包装:1 系列:PICDEM™ 类型:MCU 适用于相关产品:PIC10F206，PIC16F690，PIC16F819 所含物品:板，线缆，元件，CD，PICkit 编程器 产品目录页面:659 (CN2011-ZH PDF) |
| EVAL-ADUC7128QSPZ | 功能描述:KIT DEV FOR ADUC7128 RoHS:是 类别:编程器，开发系统 >> 通用嵌入式开发板和套件（MCU、DSP、FPGA、CPLD等） 系列:QuickStart™ PLUS 套件 产品培训模块:Blackfin® Processor Core Architecture Overview Blackfin® Device Drivers Blackfin® Optimizations for Performance and Power Consumption Blackfin® System Services 特色产品:Blackfin? BF50x Series Processors 标准包装:1 系列:Blackfin® 类型:DSP 适用于相关产品:ADSP-BF548 所含物品:板，软件，4x4 键盘，光学拨轮，QVGA 触摸屏 LCD 和 40G 硬盘 配用:ADZS-BFBLUET-EZEXT-ND - EZ-EXTENDER DAUGHTERBOARDADZS-BFLLCD-EZEXT-ND - BOARD EXT LANDSCAP LCD INTERFACE 相关产品:ADSP-BF542BBCZ-4A-ND - IC DSP 16BIT 400MHZ 400CSBGAADSP-BF544MBBCZ-5M-ND - IC DSP 16BIT 533MHZ MDDR 400CBGAADSP-BF542MBBCZ-5M-ND - IC DSP 16BIT 533MHZ MDDR 400CBGAADSP-BF542KBCZ-6A-ND - IC DSP 16BIT 600MHZ 400CSBGAADSP-BF547MBBCZ-5M-ND - IC DSP 16BIT 533MHZ MDDR 400CBGAADSP-BF548BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGAADSP-BF547BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGAADSP-BF544BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGAADSP-BF542BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGA |
| EVAL-ADUC7128QSPZ2 | 制造商:AD 制造商全称:Analog Devices 功能描述:Precision Analog Microcontroller ARM7TDMI MCU with 12-Bit ADC and DDS DAC |
| EVAL-ADUC7129QSPZ | 制造商:Analog Devices 功能描述:- Bulk |
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