參數(shù)資料
型號： TMS320F28335_1
廠商： Texas Instruments, Inc.
英文描述： Variable Capacitance Diode for TV Tuner VHF Tuning; Ratings VR (V): 32; Characteristics n: 12.0 min; Characteristics rs (ohm) max: 0.85; Characteristics C (pF) max: C2 = 32.2 to 37.5 C25 = 2.57 to 3.0; Characteristics CVR/CVR: 2/25; Cl: 2.777; Package: UFP
中文描述： 數(shù)字信號控制器（DSC）
文件頁數(shù)： 113/166頁
文件大小： 1889K
代理商： TMS320F28335_1
www.ti.com
A
6.4.2.1 Thermal Design Considerations
6.5
Emulator Connection Without Signal Buffering for the DSP
EMU0
EMU1
TRST
TMS
TDI
TDO
TCK
VDDIO
DSP
EMU0
EMU1
TRST
TMS
TDI
TDO
TCK
TCK_RET
13
14
2
1
3
7
11
9
6 inches or less
PD
GND
GND
GND
GND
GND
5
4
6
8
10
12
JTAG Header
VDDIO
TMS320F28335, TMS320F28334, TMS320F28332
Digital Signal Controllers (DSCs)
SPRS439B–JUNE 2007–REVISED OCTOBER 2007
NOTE
Typical operational current for 100-MHz devices can be estimated from
Figure 6-1
. For I
dd
current alone, subtract the current contribution of non-existent peripherals after scaling the
peripheral currents for 100 MHz. For example, to compute the current of F2833x-100
device, the contribution by the following peripherals must be subtracted from I
dd
: eCAP5,
eCAP6.
Based on the end application design and operational profile, the I
DD
and I
DDIO
currents could vary.
Systems with more than 1 Watt power dissipation may require a product level thermal design. Care should
be taken to keep T
j
within specified limits. In the end applications, T
case
should be measured to estimate
the operating junction temperature T
j
. T
case
is normally measured at the center of the package top side
surface. The thermal application notes
IC Package Thermal Metrics
(literature number
SPRA953
) and
Reliability Data for TMS320LF24x and TMS320F281x Devices
(literature number
SPRA963
) help to
understand the thermal metrics and definitions.
Figure 6-3
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 6-3
shows
the simpler, no-buffering situation. For the pullup/pulldown resistor values, see the pin description section.
For details on buffering JTAG signals and multiple processor connections, see
TMS320F/C24x DSP
Controllers CPU and Instruction Set Reference Guide
(literature number SPRU160).
Figure 6-3. Emulator Connection Without Signal Buffering for the DSP
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Electrical Specifications
113
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