6 inches or less
EMU0
13
11
2
5
4
6
8
10
12
1
3
9
7
14
EMU0
PD
GND
GND
GND
GND
GND
EMU1
EMU1
TMS
TMS
TDI
TDI
DSP
JTAG Header
TDO
TDO
TCK
TCK
TCK_RET
TRST
TRST
V
DDIO
V
DDIO
TMS320F2810, TMS320F2811, TMS320F2812
TMS320C2810, TMS320C2811, TMS320C2812
www.ti.com
SPRS174T – APRIL 2001 – REVISED MAY 2012
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 6-3
indicates the typical reduction in current consumption achieved by turning off
the clocks to various peripherals.
Table 6-3. Typical Current Consumption by Various Peripherals (at 150 MHz)
(1)
PERIPHERAL MODULE
I
DD
CURRENT REDUCTION (mA)
eCAN
12
EVA
6
EVB
6
ADC
8
(2)
SCI
4
SPI
5
McBSP
13
(1)
All peripheral clocks are disabled upon reset. Writing to/reading from peripheral registers is possible
only after the peripheral clocks are turned on.
(2)
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
DDA
) as well.
6.7
Emulator Connection Without Signal Buffering for the DSP
Figure 6-5
shows the connection between the DSP and JTAG header for a single-processor configuration.
If the distance between the JTAG header and the DSP is greater than 6 inches, the emulation signals
must be buffered. If the distance is less than 6 inches, buffering is typically not needed.
Figure 6-5
shows
the simpler, no-buffering situation. For the pullup/pulldown resistor values, see the pin description section.
Figure 6-5. Emulator Connection Without Signal Buffering for the DSP
Copyright © 2001–2012, Texas Instruments Incorporated
Electrical Specifications
97
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