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參數(shù)資料
| 型號： | TMS320C2812ZHHS |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | 16-BIT, 150 MHz, OTHER DSP, PBGA179 |
| 封裝： | LEAD FREE, BGA-179 |
| 文件頁數(shù)： | 154/156頁 |
| 文件大?。?/td> | 1826K |
| 代理商： | TMS320C2812ZHHS |
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Electrical Specifications
97
April 2001 Revised October 2005
SPRS174M
6.7
Reducing Current Consumption
28x DSPs incorporate a unique method to reduce the device current consumption. A reduction in current
consumption can be achieved by turning off the clock to any peripheral module which is not used in a given
application. Table 61 indicates the typical reduction in current consumption achieved by turning off the clocks
to various peripherals.
Table 61. Typical Current Consumption by Various Peripherals (at 150 MHz)
PERIPHERAL MODULE
IDD CURRENT REDUCTION (mA)
eCAN
12
EVA
6
EVB
6
ADC
8
SCI
4
SPI
5
McBSP
13
All peripheral clocks are disabled upon reset. Writing to/reading from peripheral registers is possible only after the peripheral clocks are turned
on.
This number represents the current drawn by the digital portion of the ADC module. Turning off the clock to the ADC module results in the
elimination of the current drawn by the analog portion of the ADC (IDDA) as well.
6.8
Power Sequencing Requirements
TMS320F2812/F2811/F2810 silicon requires dual voltages (1.8-V or 1.9-V and 3.3-V) to power up the CPU,
Flash, ROM, ADC, and the I/Os. To ensure the correct reset state for all modules during power up, there are
some requirements to be met while powering up/powering down the device. The current F2812 silicon
reference schematics (Spectrum Digital Incorporated eZdsp. board) suggests two options for the power
sequencing circuit.
Power sequencing is not needed for C281x devices. In other words, 3.3-V and 1.8-V (or 1.9-V) can ramp
together. C281x can also be used on boards that have F281x power sequencing implemented; however, if
the 1.8-V (or 1.9-V) rail lags the 3.3-V rail, the GPIO pins are undefined until the 1.8-V rail reaches at least
1 V.
Option 1:
In this approach, an external power sequencing circuit enables VDDIO first, then VDD and VDD1 (1.8 V or
1.9 V). After 1.8 V (or 1.9 V) ramps, the 3.3 V for Flash (VDD3VFL) and ADC (VDDA1/VDDA2/AVDDREFBG)
modules are ramped up. While option 1 is still valid, TI has simplified the requirement. Option 2 is the
recommended approach.
Option 2:
Enable power to all 3.3-V supply pins (VDDIO, VDD3VFL, VDDA1/VDDA2/VDDAIO/AVDDREFBG) and then
ramp 1.8 V (or 1.9 V) (VDD/VDD1) supply pins.
1.8 V or 1.9 V (VDD/VDD1) should not reach 0.3 V until VDDIO has reached 2.5 V. This ensures the reset
signal from the I/O pin has propagated through the I/O buffer to provide power-on reset to all the modules
inside the device. See Figure 610 for power-on reset timing.
Power-Down Sequencing:
During power-down, the device reset should be asserted low (8
s, minimum) before the VDD supply
reaches 1.5 V. This will help to keep on-chip flash logic in reset prior to the VDDIO/VDD power supplies
ramping down. It is recommended that the device reset control from “Low-Dropout (LDO)” regulators or
eZdsp is a trademark of Spectrum Digital Incorporated.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TMS320C28341 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Delfino Microcontrollers |
| TMS320C28341ZEPQ | 制造商:Texas Instruments 功能描述:DELFINO MICROCONTROLLER - Trays |
| TMS320C28341ZFEQ | 功能描述:32位微控制器 - MCU Delfino MCU RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT |
| TMS320C28341ZFET | 功能描述:32位微控制器 - MCU Delfino MCU RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT |
| TMS320C28341ZHHT | 功能描述:32位微控制器 - MCU Delfino MCU RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT |
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