Datasheet

0
1 2
3
4
5
6
7
Typical DCO Frequency, V = 3.0 V, T = 25°C
CC A
DCORSEL
100
10
1
0.1
f – MHz
DCO
DCOx = 31
DCOx = 0
MSP430F6638, MSP430F6637, MSP430F6636
MSP430F6635, MSP430F6634, MSP430F6633
MSP430F6632, MSP430F6631, MSP430F6630
SLAS566D –JUNE 2010–REVISED AUGUST 2013 www.ti.com
DCO Frequency
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
f
DCO(0,0)
DCO frequency (0, 0) DCORSELx = 0, DCOx = 0, MODx = 0 0.07 0.20 MHz
f
DCO(0,31)
DCO frequency (0, 31) DCORSELx = 0, DCOx = 31, MODx = 0 0.70 1.70 MHz
f
DCO(1,0)
DCO frequency (1, 0) DCORSELx = 1, DCOx = 0, MODx = 0 0.15 0.36 MHz
f
DCO(1,31)
DCO frequency (1, 31) DCORSELx = 1, DCOx = 31, MODx = 0 1.47 3.45 MHz
f
DCO(2,0)
DCO frequency (2, 0) DCORSELx = 2, DCOx = 0, MODx = 0 0.32 0.75 MHz
f
DCO(2,31)
DCO frequency (2, 31) DCORSELx = 2, DCOx = 31, MODx = 0 3.17 7.38 MHz
f
DCO(3,0)
DCO frequency (3, 0) DCORSELx = 3, DCOx = 0, MODx = 0 0.64 1.51 MHz
f
DCO(3,31)
DCO frequency (3, 31) DCORSELx = 3, DCOx = 31, MODx = 0 6.07 14.0 MHz
f
DCO(4,0)
DCO frequency (4, 0) DCORSELx = 4, DCOx = 0, MODx = 0 1.3 3.2 MHz
f
DCO(4,31)
DCO frequency (4, 31) DCORSELx = 4, DCOx = 31, MODx = 0 12.3 28.2 MHz
f
DCO(5,0)
DCO frequency (5, 0) DCORSELx = 5, DCOx = 0, MODx = 0 2.5 6.0 MHz
f
DCO(5,31)
DCO frequency (5, 31) DCORSELx = 5, DCOx = 31, MODx = 0 23.7 54.1 MHz
f
DCO(6,0)
DCO frequency (6, 0) DCORSELx = 6, DCOx = 0, MODx = 0 4.6 10.7 MHz
f
DCO(6,31)
DCO frequency (6, 31) DCORSELx = 6, DCOx = 31, MODx = 0 39.0 88.0 MHz
f
DCO(7,0)
DCO frequency (7, 0) DCORSELx = 7, DCOx = 0, MODx = 0 8.5 19.6 MHz
f
DCO(7,31)
DCO frequency (7, 31) DCORSELx = 7, DCOx = 31, MODx = 0 60 135 MHz
Frequency step between range
S
DCORSEL
S
RSEL
= f
DCO(DCORSEL+1,DCO)
/f
DCO(DCORSEL,DCO)
1.2 2.3 ratio
DCORSEL and DCORSEL + 1
Frequency step between tap
S
DCO
S
DCO
= f
DCO(DCORSEL,DCO+1)
/f
DCO(DCORSEL,DCO)
1.02 1.12 ratio
DCO and DCO + 1
Duty cycle Measured at SMCLK 40 50 60 %
df
DCO
/dT DCO frequency temperature drift f
DCO
= 1 MHz, 0.1 %/°C
df
DCO
/dV
CC
DCO frequency voltage drift f
DCO
= 1 MHz 1.9 %/V
Figure 11. Typical DCO frequency
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