Texas Instruments TMS320C2801 Stereo System User Manual


 
TMS320F2809, TMS320F2808, TMS320F2806
TMS320F2802, TMS320F2801, TMS320C2802
TMS320C2801, TMS320F28016, TMS320F28015
SPRS230L–OCTOBER 2003–REVISED DECEMBER 2009
www.ti.com
6.6.3 Device Clock Table
This section provides the timing requirements and switching characteristics for the various clock options
available on the 280x DSPs. Table 6-6 and Table 6-7 list the cycle times of various clocks.
Table 6-6. TMS320x280x Clock Table and Nomenclature (100-MHz Devices)
MIN NOM MAX UNIT
t
c(OSC)
, Cycle time 28.6 50 ns
On-chip oscillator
clock
Frequency 20 35 MHz
t
c(CI)
, Cycle time 10 250 ns
XCLKIN
(1)
Frequency 4 100 MHz
t
c(SCO)
, Cycle time 10 500 ns
SYSCLKOUT
Frequency 2 100 MHz
t
c(XCO)
, Cycle time 10 2000 ns
XCLKOUT
Frequency 0.5 100 MHz
t
c(HCO)
, Cycle time 10 20
(3)
ns
HSPCLK
(2)
Frequency 50
(3)
100 MHz
t
c(LCO)
, Cycle time 10 40
(3)
ns
LSPCLK
(2)
Frequency 25
(3)
100 MHz
t
c(ADCCLK)
, Cycle time (All devices except F2809) 80 ns
Frequency (All devices except F2809) 12.5 MHz
ADC clock
t
c(ADCCLK)
, Cycle time (F2809) 40 ns
Frequency (F2809) 25 MHz
(1) This also applies to the X1 pin if a 1.8-V oscillator is used.
(2) Lower LSPCLK and HSPCLK will reduce device power consumption.
(3) This is the default reset value if SYSCLKOUT = 100 MHz.
Table 6-7. TMS320x280x/2801x Clock Table and Nomenclature (60-MHz Devices)
MIN NOM MAX UNIT
t
c(OSC)
, Cycle time 28.6 50 ns
On-chip oscillator
clock
Frequency 20 35 MHz
t
c(CI)
, Cycle time 16.67 250 ns
XCLKIN
(1)
Frequency 4 60 MHz
t
c(SCO)
, Cycle time 16.67 500 ns
SYSCLKOUT
Frequency 2 60 MHz
t
c(XCO)
, Cycle time 16.67 2000 ns
XCLKOUT
Frequency 0.5 60 MHz
t
c(HCO)
, Cycle time 16.67 33.3
(3)
ns
HSPCLK
(2)
Frequency 30
(3)
60 MHz
t
c(LCO)
, Cycle time 16.67 66.7
(3)
ns
LSPCLK
(2)
Frequency 15
(3)
60 MHz
t
c(ADCCLK)
, Cycle time 133.33 ns
ADC clock
Frequency 7.5 MHz
(1) This also applies to the X1 pin if a 1.8-V oscillator is used.
(2) Lower LSPCLK and HSPCLK will reduce device power consumption.
(3) This is the default reset value if SYSCLKOUT = 60 MHz.
104 Electrical Specifications Copyright © 2003–2009, Texas Instruments Incorporated
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