參數(shù)資料
型號： ADZS-BF537-EZLITE
廠商： Analog Devices Inc
文件頁數(shù)： 48/68頁
文件大?。?/td> 0K
描述： BOARD EVAL ADSP-BF537
產(chǎn)品培訓(xùn)模塊： Interfacing AV Converters to Blackfin Processors
Blackfin® Processor Core Architecture Overview
Blackfin® Device Drivers
Blackfin® Optimizations for Performance and Power Consumption
Blackfin® System Services
Introduction to VisualDSP++® Tools
特色產(chǎn)品： Blackfin? BF50x Series Processors
標(biāo)準(zhǔn)包裝： 1
系列： Blackfin®
類型： DSP
適用于相關(guān)產(chǎn)品： ADSP-BF537
所含物品： 評估板、軟件和說明文檔
配用： ADZS-BFBLUET-EZEXT-ND - EZ-EXTENDER DAUGHTERBOARD
ADZS-BFLLCD-EZEXT-ND - BOARD EXT LANDSCAP LCD INTERFACE
ADZS-USBLAN-EZEXT-ND - BOARD DAUGHTER EXTENDED USB-LAN
ADZS-BFFPGA-EZEXT-ND - BOARD EVAL FPGA BLACKFIN EXTENDR
相關(guān)產(chǎn)品： ADSP-BF537KBCZ-6BV-ND - IC DSP CTLR 16BIT 208CSPBGA
ADSP-BF537BBCZ-5BV-ND - IC DSP CTLR 16BIT 208CSPBGA
ADSP-BF537KBCZ-6AV-ND - IC DSP CTLR 16BIT 182CSPBGA
ADSP-BF537BBCZ-5AV-ND - IC DSP CTLR 16BIT 182CSPBGA
ADSP-BF537BBCZ-5B-ND - IC DSP CTLR 16BIT 208CSPBGA
ADSP-BF537BBC-5A-ND - IC DSP CTLR 16BIT 182CSPBGA
Rev. J
|
Page 52 of 68
|
February 2014
TEST CONDITIONS
All timing parameters appearing in this data sheet were
measured under the conditions described in this section.
Figure 48 shows the measurement point for ac measurements
(other than output enable/disable). The measurement point is
VMEAS = VDDEXT/2.
Output Enable Time
Output pins are considered to be enabled when they have made
a transition from a high impedance state to the point when they
start driving. The output enable time tENA is the interval from
the point when a reference signal reaches a high or low voltage
level to the point when the output starts driving as shown in the
Output Enable/Disable diagram (Figure 49). The time tENA_MEA-
SURED is the interval from when the reference signal switches to
when the output voltage reaches 2.0 V (output high) or 1.0 V
(output low). Time tTRIP is the interval from when the output
starts driving to when the output reaches the 1.0 V or 2.0 V trip
voltage. Time tENA is calculated as shown in
the equation:
If multiple pins (such as the data bus) are enabled, the measure-
ment value is that of the first pin to start driving.
Output Disable Time
Output pins are considered to be disabled when they stop driv-
ing, go into a high impedance state, and start to decay from their
output high or low voltage. The time for the voltage on the bus
to decay by V is dependent on the capacitive load, CL, and the
load current, IL. This decay time can be approximated by
the equation:
The output disable time tDIS is the difference between tDIS_MEA-
SURED and tDECAY as shown in Figure 49. The time tDIS_MEASURED is
the interval from when the reference signal switches to when the
output voltage decays V from the measured output-high or
output-low voltage. The time tDECAY is calculated with the test
loads CL and IL, and with V equal to 0.5 V.
Example System Hold Time Calculation
To determine the data output hold time in a particular system,
first calculate tDECAY using the equation given above. Choose V
to be the difference between the processor’s output voltage and
the input threshold for the device requiring the hold time. A
typical V is 0.4 V. CL is the total bus capacitance (per data line),
and IL is the total leakage or three-state current (per data line).
The hold time is tDECAY plus the minimum disable time (for
example, tDSDAT for an SDRAM write cycle).
Figure 48. Voltage Reference Levels for AC Measurements (Except
Output Enable/Disable)
INPUT
OR
OUTPUT
VMEAS
tENA
tENA_MEASURED tTRIP
–
=
Figure 49. Output Enable/Disable
tDECAY
CL V
I
L
=
REFERENCE
SIGNAL
tDIS
OUTPUT STARTS DRIVING
VOH (MEASURED)
V
VOL (MEASURED) + V
tDIS_MEASURED
VOH
(MEASURED)
VOL
(MEASURED)
VTRIP(HIGH)
VOH(MEASURED)
VOL(MEASURED)
HIGH IMPEDANCE STATE
OUTPUT STOPS DRIVING
tENA
tDECAY
tENA_MEASURED
tTRIP
VTRIP(LOW)
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參數(shù)描述
ADZS-BF537-STAMP 功能描述:SYSTEM DEV FOR ADSP-BF537 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 通用嵌入式開發(fā)板和套件（MCU、DSP、FPGA、CPLD等） 系列:Blackfin® 產(chǎn)品培訓(xùn)模塊:Blackfin® Processor Core Architecture Overview Blackfin® Device Drivers Blackfin® Optimizations for Performance and Power Consumption Blackfin® System Services 特色產(chǎn)品:Blackfin? BF50x Series Processors 標(biāo)準(zhǔn)包裝:1 系列:Blackfin® 類型:DSP 適用于相關(guān)產(chǎn)品:ADSP-BF548 所含物品:板，軟件，4x4 鍵盤，光學(xué)撥輪，QVGA 觸摸屏 LCD 和 40G 硬盤 配用:ADZS-BFBLUET-EZEXT-ND - EZ-EXTENDER DAUGHTERBOARDADZS-BFLLCD-EZEXT-ND - BOARD EXT LANDSCAP LCD INTERFACE 相關(guān)產(chǎn)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
ADZS-BF537-STAMP 制造商:Analog Devices 功能描述:Microcontroller Development Tool
ADZS-BF538-EZLITE 制造商:Analog Devices 功能描述:- Bulk
ADZSBF538FEZLITE 制造商:Analog Devices 功能描述:RES Wirewound 6927 75Ohm 1% 3W 20PPM SMD T/R
ADZS-BF538F-EZLITE 功能描述:BOARD EVAL FOR ADSP-BF538 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 通用嵌入式開發(fā)板和套件（MCU、DSP、FPGA、CPLD等） 系列:Blackfin® 產(chǎn)品培訓(xùn)模塊:Blackfin® Processor Core Architecture Overview Blackfin® Device Drivers Blackfin® Optimizations for Performance and Power Consumption Blackfin® System Services 特色產(chǎn)品:Blackfin? BF50x Series Processors 標(biāo)準(zhǔn)包裝:1 系列:Blackfin® 類型:DSP 適用于相關(guān)產(chǎn)品:ADSP-BF548 所含物品:板，軟件，4x4 鍵盤，光學(xué)撥輪，QVGA 觸摸屏 LCD 和 40G 硬盤 配用:ADZS-BFBLUET-EZEXT-ND - EZ-EXTENDER DAUGHTERBOARDADZS-BFLLCD-EZEXT-ND - BOARD EXT LANDSCAP LCD INTERFACE 相關(guān)產(chǎn)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
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