- 您现在的位置：买卖IC网 > PDF目录1900 > ADSP-BF547YBCZ-4A (Analog Devices Inc)IC DSP BLACKFIN 400MHZ 400CSPBGA PDF资料下载
参数资料
| 型号： | ADSP-BF547YBCZ-4A |
| 厂商： | Analog Devices Inc |
| 文件页数： | 88/100页 |
| 文件大小： | 0K |
| 描述： | IC DSP BLACKFIN 400MHZ 400CSPBGA |
| 标准包装： | 1 |
| 系列： | Blackfin® |
| 类型： | 定点 |
| 接口： | SPI，SSP，TWI，UART，USB |
| 时钟速率： | 400MHz |
| 非易失内存： | 外部 |
| 芯片上RAM： | 260kB |
| 电压 - 输入/输出： | 2.50V，3.30V |
| 电压 - 核心： | 1.25V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 400-LFBGA，CSPBGA |
| 供应商设备封装： | 400-CSPBGA（17x17） |
| 包装： | 托盘 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页当前第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页
Rev. D
|
Page 88 of 100
|
May 2011
ADSP-BF542/ADSP-BF544/ADSP-BF547/ADSP-BF548/ADSP-BF549
TEST CONDITIONS
All timing parameters appearing in this data sheet were mea-
sured under the conditions described in this section. Figure 72
shows the measurement point for AC measurements (except
output enable/disable). The measurement point VMEAS is
VDDEXT/2 or VDDDDR/2, depending on the pin under test.
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 73). The time,
tENA_MEASURED, is the interval from the point when the reference
signal switches to the point when the output voltage reaches
either 1.75 V (output high) or 1.25 V (output low). Time tTRIP is
the interval from when the output starts driving to when the
output reaches the 1.25 V or 1.75 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
ΔV is dependent on the capacitive load, C
L and
the load current, IL. This decay time can be approximated by the
equation:
The output disable time tDIS is the difference between
tDIS_MEASURED is the interval from when the reference signal
switches to when the output voltage decays
ΔV from the mea-
sured output high or output low voltage. The time tDECAY is
calculated with test loads CL and IL, and with ΔV equal to 0.25 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 ΔV
to be the difference between the ADSP-BF54x Blackfin proces-
sors’ output voltage and the input threshold for the device
requiring the hold time. A typical
ΔV will be 0.4 V. C
L is the total
bus capacitance (per data line), and IL is the total leakage or
three-state current (per data line). The hold time will be tDECAY
plus the minimum disable time (for example, tDDAT for an asyn-
chronous memory write cycle).
CAPACITIVE LOADING
Output delays and holds are based on standard capacitive loads
of an average of 6 pF on all balls (see Figure 74).
VLOAD is equal to VDDEXT/2 or VDDDDR/2, depending on the pin
under test.
Figure 72. Voltage Reference Levels for AC Measurements
(Except Output Enable/Disable)
INPUT
OR
OUTPUT
VMEAS
t
ENA
t
ENA_MEASURED
t
TRIP
–
=
t
DECAY
C
L
V
Δ
() I
L
=
Figure 73. Output Enable/Disable
Figure 74. Equivalent Device Loading for AC Measurements
(Includes All Fixtures)
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)
T1
ZO = 50
Ω (impedance)
TD = 4.04
± 1.18 ns
2pF
TESTER PIN ELECTRONICS
50
Ω
0.5pF
70
Ω
400
Ω
45
Ω
4pF
NOTES:
THE WORST-CASE TRANSMISSION LINE DELAY IS SHOWN AND CAN BE USED
FOR THE OUTPUT TIMING ANALYSIS TO REFELECT THE TRANSMISSION LINE
EFFECT AND MUST BE CONSIDERED. THE TRANSMISSION LINE (TD), IS FOR
LOAD ONLY AND DOES NOT AFFECT THE DATA SHEET TIMING SPECIFICATIONS.
ANALOG DEVICES RECOMMENDS USING THE IBIS MODEL TIMING FOR A GIVEN
SYSTEM REQUIREMENT. IF NECESSARY, A SYSTEM MAY INCORPORATE
EXTERNAL DRIVERS TO COMPENSATE FOR ANY TIMING DIFFERENCES.
VLOAD
DUT
OUTPUT
50
Ω
相关PDF资料 |
PDF描述 |
|---|---|
| ADSP-BF592BCPZ | IC DSP CTRLR 64LFCSP |
| ADSP-TS101SAB1-100 | IC DSP CTRLR 128BIT BUS 625BGA |
| ADSP-TS201SYBP-050 | IC PROCESSOR 500MHZ 576-SBGA |
| ADSP-TS202SABPZ050 | IC PROCESSOR 500MHZ 576BGA |
| ADSP-TS203SABP-050 | IC DSP FLOAT/FIXED 500MHZ 576BGA |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADSP-BF548BBCZ | 制造商:Analog Devices 功能描述: |
| ADSP-BF548BBCZ-5A | 功能描述:IC DSP 16BIT 533MHZ 400CSBGA RoHS:是 类别:集成电路 (IC) >> 嵌入式 - DSP（数字式信号处理器） 系列:Blackfin® 标准包装:40 系列:TMS320DM64x, DaVinci™ 类型:定点 接口:I²C，McASP，McBSP 时钟速率:400MHz 非易失内存:外部 芯片上RAM:160kB 电压 - 输入/输出:3.30V 电压 - 核心:1.20V 工作温度:0°C ~ 90°C 安装类型:表面贴装 封装/外壳:548-BBGA，FCBGA 供应商设备封装:548-FCBGA（27x27） 包装:托盘 配用:TMDSDMK642-0E-ND - DEVELPER KIT W/NTSC CAMERA296-23038-ND - DSP STARTER KIT FOR TMS320C6416296-23059-ND - FLASHBURN PORTING KIT296-23058-ND - EVAL MODULE FOR DM642TMDSDMK642-ND - DEVELOPER KIT W/NTSC CAMERA |
| ADSP-BF548BBCZ-5AA | 功能描述:IC DSP 16BIT 533MHZ 400CSBGA 制造商:analog devices inc. 系列:Blackfin? 包装:托盘 零件状态:有效 类型:定点 接口:CAN，SPI，SSP，TWI，UART，USB 时钟速率:533MHz 非易失性存储器:外部 片载 RAM:260kB 电压 - I/O:2.50V，3.30V 电压 - 内核:1.25V 工作温度:-40°C ~ 85°C（TA） 安装类型:表面贴装 封装/外壳:400-LFBGA，CSPBGA 供应商器件封装:400-CSPBGA（17x17） 标准包装:1 |
| ADSP-BF548BBCZ-5X | 制造商:Analog Devices 功能描述:- Trays |
| ADSP-BF548MBBCZ-5M | 功能描述:IC DSP 533MHZ W/DDR 400CSPBGA RoHS:是 类别:集成电路 (IC) >> 嵌入式 - DSP（数字式信号处理器） 系列:Blackfin® 标准包装:40 系列:TMS320DM64x, DaVinci™ 类型:定点 接口:I²C，McASP，McBSP 时钟速率:400MHz 非易失内存:外部 芯片上RAM:160kB 电压 - 输入/输出:3.30V 电压 - 核心:1.20V 工作温度:0°C ~ 90°C 安装类型:表面贴装 封装/外壳:548-BBGA，FCBGA 供应商设备封装:548-FCBGA（27x27） 包装:托盘 配用:TMDSDMK642-0E-ND - DEVELPER KIT W/NTSC CAMERA296-23038-ND - DSP STARTER KIT FOR TMS320C6416296-23059-ND - FLASHBURN PORTING KIT296-23058-ND - EVAL MODULE FOR DM642TMDSDMK642-ND - DEVELOPER KIT W/NTSC CAMERA |
发布紧急采购，3分钟左右您将得到回复。