參數(shù)資料
型號(hào)： DSP56311VF150
廠商： Freescale Semiconductor
文件頁數(shù)： 71/96頁
文件大小： 0K
描述： IC DSP 24BIT 150MHZ 196-BGA
標(biāo)準(zhǔn)包裝： 126
系列： DSP56K/Symphony
類型： 定點(diǎn)
接口： 主機(jī)接口，SSI，SCI
時(shí)鐘速率： 150MHz
非易失內(nèi)存： ROM（576 B）
芯片上RAM： 384kB
電壓 - 輸入/輸出： 3.30V
電壓 - 核心： 1.80V
工作溫度： -40°C ~ 100°C
安裝類型： 表面貼裝
封裝/外殼： 196-LBGA
供應(yīng)商設(shè)備封裝： 196-MAPBGA（15x15）
包裝： 托盤
Power Consumption Considerations
DSP56311 Technical Data, Rev. 8
Freescale Semiconductor
4-3
Because the DSP output signals have fast rise and fall times, PCB trace lengths should be minimal. This
recommendation particularly applies to the address and data buses as well as the IRQA, IRQB, IRQC, IRQD,
TA
, and BG pins. Maximum PCB trace lengths on the order of 6 inches are recommended.
Consider all device loads as well as parasitic capacitance due to PCB traces when you calculate
capacitance. This is especially critical in systems with higher capacitive loads that could create higher
transient currents in the VCC and GND circuits.
All inputs must be terminated (that is, not allowed to float) by CMOS levels except for the three pins with
internal pull-up resistors (TRST, TMS, DE).
Take special care to minimize noise levels on the VCCP, GNDP, and GNDP1 pins.
The following pins must be asserted during power-up: RESET and TRST. A stable EXTAL signal should be
supplied before deassertion of RESET. If the VCC reaches the required level before EXTAL is stable or
other “required RESET duration” conditions are met (see Table 2-7), the device circuitry can be in an
uninitialized state that may result in significant power consumption and heat-up. Designs should minimize
this condition to the shortest possible duration.
Ensure that during power-up, and throughout the DSP56311 operation, VCCQH is always higher or equal to
the VCC voltage level.
If multiple DSP devices are on the same board, check for cross-talk or excessive spikes on the supplies due
to synchronous operation of the devices.
The Port A data bus (D[0–23]), HI08, ESSI0, ESSI1, SCI, and timers all use internal keepers to maintain the
last output value even when the internal signal is tri-stated. Typically, no pull-up or pull-down resistors
should be used with these signal lines. However, if the DSP is connected to a device that requires pull-up
resistors (such as an MPC8260), the recommended resistor value is 10 K
or less. If more than one DSP
must be connected in parallel to the other device, the pull-up resistor value requirement changes as
follows:
—2 DSPs = 7 K
or less
—3 DSPs = 4 K
or less
—4 DSPs = 3 K
or less
—5 DSPs = 2 K
or less
—6 DSPs = 1.5 K
or less
4.3 Power Consumption Considerations
Power dissipation is a key issue in portable DSP applications. Some of the factors affecting current consumption
are described in this section. Most of the current consumed by CMOS devices is alternating current (ac), which is
charging and discharging the capacitances of the pins and internal nodes. Current consumption is described by this
formula:
Equation 3:
Where:
C
=
node/pin capacitance
V
=
voltage swing
f
=
frequency of node/pin toggle
Example 4-1. Current Consumption
For a Port A address pin loaded with 50 pF capacitance, operating at 3.3 V, with a 66 MHz clock, toggling at its maximum possible rate (33
MHz), the current consumption is expressed in Equation 4.
I
CV
f
×
=
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DSP56311VF150B1 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC 24 BIT DSP RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
DSP56311VF150R2 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC 24 BIT DSP RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
DSP56311VF160 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC SSP26111VF160A RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
DSP56311VL150 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC 24 BIT DSP PBFREE RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
DSP56311VL150B1 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC 24 BIT DSP PBFREE RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
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