參數(shù)資料
型號： TMS320LC17
廠商： Texas Instruments, Inc.
元件分類： 數(shù)字信號處理
英文描述： Digital Signal Processors(278ns指令周期，分離的程序和數(shù)據(jù)總線，外部輪詢中斷的DSP)
中文描述： 數(shù)字信號處理器（278ns指令周期，分離的程序和數(shù)據(jù)總線，外部輪詢中斷的數(shù)字信號處理器）
文件頁數(shù)： 103/139頁
文件大?。?/td> 1478K
代理商： TMS320LC17
mA
ICC
Supply current
Crystal frequenPARAMETER
MHz
RL = 825
,
CL = 100 pF
(see Figure 2)
TMS320C17, TMS320E17, TMS320P17
DIGITAL SIGNAL PROCESSORS
SPRS009C–JANUARY 1987–REVISED JULY 1991
POST OFFICE BOX 1443
HOUSTON, TEXAS 77001
103
electrical characteristics over specified temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
TMS320C17
f = 20.5 MHz, VCC = 5.5 V, TA = 0
°
C to 70
°
C
f = 25.6 MHz, VCC = 5.5 V, TA = – 40
°
C to 85
°
C
50
65
TMS320E17/P1
7
55
75
All typical values are at TA = 70
°
C and are used for thermal resistance calculations.
ICC characteristics are inversely proportional to temperature. For ICC dependance on temperature, frequency, and loading, see Figure 3.
CLOCK CHARACTERISTICS AND TIMING
The
′
C17/E17/P17 can use either its internal oscillator or an external frequency source for a clock.
internal clock option
The internal oscillator is enabled by connecting a crystal across X1 and X2/CLKIN (see Figure 1). The frequency
of CLKOUT is one-fourth the crystal fundamental frequency. The crystal should be fundamental mode, and
parallel resonant, with an effective series resistance of 30 ohms, a power dissipation of 1 mW, and should be
specified at a load capacitance of 20 pF.
TEST CONDITIONS
TA = 0
°
C to 70
°
C
TA = – 40
°
C to 85
°
C
MIN
NOM
MAX
UNIT
TMS320C17
6.7
20.5
TMS320E17/P1
7
6.7
20.5
C1, C2
TA = 0
°
C to 70
°
C
10
pF
external clock option
An external frequency source can be used by injecting the frequency directly into X2/CLKIN with X1 left
unconnected. The external frequency injected must conform to the specifications listed in the table below.
switching characteristics over recommended operating conditions
PARAMETER
CLKOUT cycle time§
TEST CONDITIONS
MIN
195.12
NOM
200
10
MAX
UNIT
ns
tc(C)
tr(C)
tf(C)
tw(CL)
tw(CH)
td(MCC)
CLKOUT rise time
ns
CLKOUT fall time
8
ns
Pulse duration, CLKOUT low
92
90
ns
Pulse duration, CLKOUT high
Delay time, CLKIN
↑
to CLKOUT
↓
ns
25
60
ns
§tc(C) is the cycle time of CLKOUT, i.e., 4tc(MC) (4 times CLKIN cycle time if an external oscillator is used).
Values derived from characterization data and not tested.
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