參數(shù)資料
型號(hào): TMS320LC545
廠商: Texas Instruments, Inc.
元件分類: 數(shù)字信號(hào)處理
英文描述: Digital Signal Processors(20/25ns指令周期, 高性能,大并行度,特殊指令集可有效實(shí)現(xiàn)多種復(fù)雜算法及應(yīng)用的DSP)
中文描述: 數(shù)字信號(hào)處理器(20/25ns指令周期,高性能,大并行度,特殊指令集可有效實(shí)現(xiàn)多種復(fù)雜算法及應(yīng)用的數(shù)字信號(hào)處理器)
文件頁數(shù): 62/107頁
文件大?。?/td> 2149K
代理商: TMS320LC545
TMS320C54x, TMS320LC54x
FIXED-POINT DIGITAL SIGNAL PROCESSORS
SPRS039A – FEBRUARY 1996 – REVISED JULY 1997
59
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
PARAMETER MEASUREMENT INFORMATION
Tester Pin
Electronics
VLoad
IOL
C
T
IOH
Output
Under
Test
50
Where: I
OL
= 1.5 mA (all outputs)
= 300
μ
A (all outputs)
V
Load
= 1.5 V
C
T
= 40 pF typical load circuit capacitance.
I
OH
Figure 10. 3.3-V Test Load Circuit
internal divide-by-two clock option with external crystal
The internal oscillator is enabled by connecting a crystal across X1 and X2/CLKIN. The frequency of CLKOUT
is one-half the crystal’s oscillating frequency. The crystal should be either fundamental or overtone operation,
and parallel resonant, with an effective series resistance of 30
and power dissipation of 1 mW; it should be
specified at a load capacitance of 20 pF. Note the curcuit shown in Figure 11 represents fundamental mode
operation. For overtone mode operation, additional components are generally required.
recommended operating conditions (see Figure 11)
’C54x-40
’LC54x-40
’LC54x-50
’54x-66
UNIT
MIN
0
NOM
MAX
MIN
0
NOM
MAX
MIN
NOM
MAX
fx
C1, C2
This device utilizes a fully static design and therefore can operate with tc(CI) approaching
. The device is characterized at frequencies
approaching 0 Hz but is tested at a minimum of 3.3 MHz to meet device test time requirement.
Input clock frequency
80
100
0
133.33
MHz
10
10
10
pF
X1
X2/CLKIN
C1
C2
Crystal
Figure 11. Internal Clock Option
A
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