3 device clock table – Texas Instruments TMS320F2802 User Manual
Page 104
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SPRS230N – OCTOBER 2003 – REVISED MAY 2012
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.
and
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
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