Texas Instruments EVM430-F6736 - MSP430F6736 EVM for Metering EVM430-F6736 EVM430-F6736 Datenbogen
Produktcode
EVM430-F6736
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
MSP430F673x
MSP430F672x
MSP430F672x
SLAS731C – DECEMBER 2011 – REVISED FEBRUARY 2013
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)
(1)
DCORSELx = 0, DCOx = 0, MODx = 0
0.07
0.20
MHz
f
DCO(0,31)
DCO frequency (0, 31)
(1)
DCORSELx = 0, DCOx = 31, MODx = 0
0.70
1.70
MHz
f
DCO(1,0)
DCO frequency (1, 0)
(1)
DCORSELx = 1, DCOx = 0, MODx = 0
0.15
0.36
MHz
f
DCO(1,31)
DCO frequency (1, 31)
(1)
DCORSELx = 1, DCOx = 31, MODx = 0
1.47
3.45
MHz
f
DCO(2,0)
DCO frequency (2, 0)
(1)
DCORSELx = 2, DCOx = 0, MODx = 0
0.32
0.75
MHz
f
DCO(2,31)
DCO frequency (2, 31)
(1)
DCORSELx = 2, DCOx = 31, MODx = 0
3.17
7.38
MHz
f
DCO(3,0)
DCO frequency (3, 0)
(1)
DCORSELx = 3, DCOx = 0, MODx = 0
0.64
1.51
MHz
f
DCO(3,31)
DCO frequency (3, 31)
(1)
DCORSELx = 3, DCOx = 31, MODx = 0
6.07
14.0
MHz
f
DCO(4,0)
DCO frequency (4, 0)
(1)
DCORSELx = 4, DCOx = 0, MODx = 0
1.3
3.2
MHz
f
DCO(4,31)
DCO frequency (4, 31)
(1)
DCORSELx = 4, DCOx = 31, MODx = 0
12.3
28.2
MHz
f
DCO(5,0)
DCO frequency (5, 0)
(1)
DCORSELx = 5, DCOx = 0, MODx = 0
2.5
6.0
MHz
f
DCO(5,31)
DCO frequency (5, 31)
(1)
DCORSELx = 5, DCOx = 31, MODx = 0
23.7
54.1
MHz
f
DCO(6,0)
DCO frequency (6, 0)
(1)
DCORSELx = 6, DCOx = 0, MODx = 0
4.6
10.7
MHz
f
DCO(6,31)
DCO frequency (6, 31)
(1)
DCORSELx = 6, DCOx = 31, MODx = 0
39.0
88.0
MHz
f
DCO(7,0)
DCO frequency (7, 0)
(1)
DCORSELx = 7, DCOx = 0, MODx = 0
8.5
19.6
MHz
f
DCO(7,31)
DCO frequency (7, 31)
(1)
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
CORE
DCO frequency voltage drift
f
DCO
= 1 MHz
1.9
%/V
(1)
When selecting the proper DCO frequency range (DCORSELx), the target DCO frequency, f
DCO
, should be set to reside within the
range of f
DCO(n, 0),MAX
≤
f
DCO
≤
f
DCO(n, 31),MIN
, where f
DCO(n, 0),MAX
represents the maximum frequency specified for the DCO frequency,
range n, tap 0 (DCOx = 0) and f
DCO(n,31),MIN
represents the minimum frequency specified for the DCO frequency, range n, tap 31
(DCOx = 31). This ensures that the target DCO frequency resides within the range selected. It should also be noted that if the actual
f
f
DCO
frequency for the selected range causes the FLL or the application to select tap 0 or 31, the DCO fault flag is set to report that the
selected range is at its minimum or maximum tap setting.
Figure 10. Typical DCO Frequency
Copyright © 2011–2013, Texas Instruments Incorporated
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