MSP430F543XA_12 Datasheet, PDF (51/104 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F543xA, MSP430F541xA
www.ti.com
SLAS655B – JANUARY 2010 – REVISED OCTOBER 2010
DCO Frequency
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP
f_DCO(0,0)
f_DCO(0,31)
f_DCO(1,0)
f_DCO(1,31)
f_DCO(2,0)
f_DCO(2,31)
f_DCO(3,0)
f_DCO(3,31)
f_DCO(4,0)
f_DCO(4,31)
f_DCO(5,0)
f_DCO(5,31)
f_DCO(6,0)
f_DCO(6,31)
f_DCO(7,0)
f_DCO(7,31)
S_DCORSEL
DCO frequency (0, 0)
DCO frequency (0, 31)
DCO frequency (1, 0)
DCO frequency (1, 31)
DCO frequency (2, 0)
DCO frequency (2, 31)
DCO frequency (3, 0)
DCO frequency (3, 31)
DCO frequency (4, 0)
DCO frequency (4, 31)
DCO frequency (5, 0)
DCO frequency (5, 31)
DCO frequency (6, 0)
DCO frequency (6, 31)
DCO frequency (7, 0)
DCO frequency (7, 31)
Frequency step between range
DCORSEL and DCORSEL + 1
DCORSELx = 0, DCOx = 0, MODx = 0
DCORSELx = 0, DCOx = 31, MODx = 0
DCORSELx = 1, DCOx = 0, MODx = 0
DCORSELx = 1, DCOx = 31, MODx = 0
DCORSELx = 2, DCOx = 0, MODx = 0
DCORSELx = 2, DCOx = 31, MODx = 0
DCORSELx = 3, DCOx = 0, MODx = 0
DCORSELx = 3, DCOx = 31, MODx = 0
DCORSELx = 4, DCOx = 0, MODx = 0
DCORSELx = 4, DCOx = 31, MODx = 0
DCORSELx = 5, DCOx = 0, MODx = 0
DCORSELx = 5, DCOx = 31, MODx = 0
DCORSELx = 6, DCOx = 0, MODx = 0
DCORSELx = 6, DCOx = 31, MODx = 0
DCORSELx = 7, DCOx = 0, MODx = 0
DCORSELx = 7, DCOx = 31, MODx = 0
S_RSEL = f_{DCO(DCORSEL+1,DCO)}/f_{DCO(DCORSEL,DCO)}
0.07
0.70
0.15
1.47
0.32
3.17
0.64
6.07
1.3
12.3
2.5
23.7
4.6
39.0
8.5
60
1.2
S_DCO
Frequency step between tap
DCO and DCO + 1
S_DCO = f_{DCO(DCORSEL,DCO+1)}/f_{DCO(DCORSEL,DCO)}
1.02
Duty cycle
Measured at SMCLK
40
50
df_DCO/dT
DCO frequency temperature drift f_DCO = 1 MHz,
0.1
df_DCO/dV_CC
DCO frequency voltage drift
f_DCO = 1 MHz
1.9
MAX
0.20
1.70
0.36
3.45
0.75
7.38
1.51
14.0
3.2
28.2
6.0
54.1
10.7
88.0
19.6
135
UNIT
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
2.3 ratio
1.12 ratio
60 %
%/°C
%/V
Typical DCO Frequency, V_CC = 3.0 V, T_A = 25°C
100
10
DCOx = 31
1
DCOx = 0
0.1
0
1
2
3
4
5
6
7
DCORSEL
Figure 10. Typical DCO frequency
Copyright © 2010, Texas Instruments Incorporated
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