参数资料
型号: TMX320C2811ZHHQ
厂商: Texas Instruments, Inc.
英文描述: CTV 22C 22#22D SKT RECP
中文描述: TMS320R2811,TMS320R2812数字信号处理器
文件页数: 87/147页
文件大小: 2021K
代理商: TMX320C2811ZHHQ
Electrical Specifications
87
June 2004
SPRS257
6.5
Current Consumption Graphs
0
5
15
30
45
60
75
90
105
120
135
150
SYSCLOCKOUT (MHz)
C
0
30
60
90
120
150
180
210
240
IDD
IDDIO
IDDA
Total
Figure 6
1. R2812/R2811 Typical Current Consumption (With Peripheral Clocks Enabled)
6.6
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 6
1 indicates the typical reduction in current consumption achieved by turning off the clocks
to various peripherals.
Table 6
1. Typical Current Consumption by Various Peripherals (at 150 MHz)
PERIPHERAL MODULE
I
DD
CURRENT REDUCTION (mA)
12
eCAN
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 (I
CCA
) as well.
6.7
Power Sequencing Requirements
Power sequencing is not required on the R281x devices. In other words, 3.3-V and 1.8-V (or 1.9-V) can ramp
together. R281x 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.
A
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