参数资料
型号: TMS320C2812ZHHS
厂商: TEXAS INSTRUMENTS INC
元件分类: 数字信号处理
英文描述: 16-BIT, 150 MHz, OTHER DSP, PBGA179
封装: LEAD FREE, BGA-179
文件页数: 4/156页
文件大小: 1826K
代理商: TMS320C2812ZHHS
Electrical Specifications
101
April 2001 Revised October 2005
SPRS174M
6.13
Device Clock Table
This section provides the timing requirements and switching characteristics for the various clock options
available on the F281x and C281x DSPs. Table 63 lists the cycle times of various clocks.
Table 63. TMS320F281x and TMS320C281x Clock Table and Nomenclature
MIN
NOM
MAX
UNIT
On-chip oscillator clock
tc(OSC) , Cycle time
28.6
50
ns
On-chip oscillator clock
Frequency
20
35
MHz
XCLKIN
tc(CI) , Cycle time
6.67
250
ns
XCLKIN
Frequency
4
150
MHz
SYSCLKOUT
tc(SCO) , Cycle time
6.67
500
ns
SYSCLKOUT
Frequency
2
150
MHz
XCLKOUT
tc(XCO) , Cycle time
6.67
2000
ns
XCLKOUT
Frequency
0.5
150
MHz
HSPCLK
tc(HCO) , Cycle time
6.67
13.3
ns
HSPCLK
Frequency
75
150
MHz
LSPCLK
tc(LCO) , Cycle time
13.3
26.6
ns
LSPCLK
Frequency
37.5
75
MHz
ADC clock
tc(ADCCLK) , Cycle time
40
ns
ADC clock
Frequency
25
MHz
SPI clock
tc(SPC) , Cycle time
50
ns
SPI clock
Frequency
20
MHz
McBSP
tc(CKG) , Cycle time
50
ns
McBSP
Frequency
20
MHz
XTIMCLK
tc(XTIM) , Cycle time
6.67
ns
XTIMCLK
Frequency
150
MHz
The maximum value for ADCCLK frequency is 25 MHz. For SYSCLKOUT values of 25 MHz or lower, ADCCLK has to be SYSCLKOUT/2 or lower.
ADCCLK = SYSCLKOUT is not a valid mode for any value of SYSCLKOUT.
This is the default reset value if SYSCLKOUT = 150 MHz.
6.14
Clock Requirements and Characteristics
6.14.1
Input Clock Requirements
The clock provided at the XCLKIN pin generates the internal CPU clock cycle.
Table 64. Input Clock Frequency
PARAMETER
MIN
TYP
MAX
UNIT
Resonator
20
35
fx
Input clock frequency
Crystal
20
35
MHz
fx
Input clock frequency
XCLKIN
Without PLL
4
150
MHz
XCLKIN
With PLL
5
30
fl
Limp mode clock frequency
2
MHz
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