参数资料
型号: TMS320SP5410AGGU12
厂商: Texas Instruments, Inc.
元件分类: 数字信号处理
英文描述: Fixed-Point Digital Signal Processor
中文描述: 定点数字信号处理器
文件页数: 58/100页
文件大小: 913K
代理商: TMS320SP5410AGGU12
www.ti.com
5.6
Internal Oscillator With External Crystal
C
L
C
1
C
2
(
C
1
C
2
)
X1
X2/CLKIN
C1
C2
Crystal
TMS320VC5410A
Fixed-Point Digital Signal Processor
SPRS139G–NOVEMBER 2000–REVISED JANUARY 2005
The internal oscillator is enabled by selecting the appropriate clock mode at reset (this is de-
vice-dependent; see Section Section 3.6) and connecting a crystal or ceramic resonator across X1 and
X2/CLKIN. The CPU clock frequency is one-half, one-fourth, or a multiple of the oscillator frequency. The
multiply ratio is determined by the bit settings in the CLKMD register.
The crystal should be in fundamental-mode operation, and parallel resonant, with an effective series
resistance of 30
maximum and power dissipation of 1 mW. The connection of the required circuit,
consisting of the crystal and two load capacitors, is shown in Figure 5-2. The load capacitors, C
1
and C
2
,
should be chosen such that the equation below is satisfied. C
L
(recommended value of 10 pF)in the
equation is the load specified for the crystal.
Table 5-1. Input Clock Frequency Characteristics
MIN
10
(1)
MAX
20
(2)
UNIT
MHz
f
x
Input clock frequency
(1)
This device utilizes a fully static design and therefore can operate with t
c(CI)
approaching
. The device is characterized at frequencies
approaching 0 Hz
It is recommended that the PLL multiply by N clocking option be used for maximum frequency operation.
(2)
Figure 5-2. Internal Divide-By-Two Clock Option With External Crystal
58
Electrical Specifications
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