MSP430X241X Datasheet, PDF (41/98 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430x241x, MSP430x261x
MIXED SIGNAL MICROCONTROLLER
SLAS541A -- JUNE 2007 -- REVISED OCTOBER 2007
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
main DCO characteristics
D All ranges selected by RSELx overlap with RSELx + 1: RSELx = 0 overlaps RSELx = 1, ... RSELx = 14
overlaps RSELx = 15.
D DCO control bits DCOx have a step size as defined by parameter S_DCO.
D Modulation control bits MODx select how often f_{DCO(RSEL,DCO+1)} is used within the period of 32 DCOCLK
cycles. The frequency f_{DCO(RSEL,DCO)} is used for the remaining cycles. The frequency is an average equal
to:
f_average
=
MOD
×
32 × f_{DCO(RSEL,DCO)} × f_{DCO(RSEL,DCO+1)}
f_{DCO(RSEL,DCO)}+(32−MOD) × f_{DCO(RSEL,DCO+1)}
DCO frequency
Vcc
f_DCO(0,0)
f_DCO(0,3)
f_DCO(1,3)
f_DCO(2,3)
f_DCO(3,3)
f_DCO(4,3)
f_DCO(5,3)
f_DCO(6,3)
f_DCO(7,3)
f_DCO(8,3)
f_DCO(9,3)
f_DCO(10,3)
f_DCO(11,3)
f_DCO(12,3)
f_DCO(13,3)
f_DCO(14,3)
f_DCO(15,3)
f_DCO(15,7)
S_RSEL
PARAMETER
Supply voltage range
DCO frequency (0, 0)
DCO frequency (0, 3)
DCO frequency (1, 3)
DCO frequency (2, 3)
DCO frequency (3, 3)
DCO frequency (4, 3)
DCO frequency (5, 3)
DCO frequency (6, 3)
DCO frequency (7, 3)
DCO frequency (8, 3)
DCO frequency (9, 3)
DCO frequency (10, 3)
DCO frequency (11, 3)
DCO frequency (12, 3)
DCO frequency (13, 3)
DCO frequency (14, 3)
DCO frequency (15, 3)
DCO frequency (15, 7)
Frequency step between
range RSEL and RSEL+1
TEST CONDITIONS
RSELx < 14
RSELx = 14
RSELx = 15
RSELx = 0, DCOx = 0, MODx = 0
RSELx = 0, DCOx = 3, MODx = 0
RSELx = 1, DCOx = 3, MODx = 0
RSELx = 2, DCOx = 3, MODx = 0
RSELx = 3, DCOx = 3, MODx = 0
RSELx = 4, DCOx = 3, MODx = 0
RSELx = 5, DCOx = 3, MODx = 0
RSELx = 6, DCOx = 3, MODx = 0
RSELx = 7, DCOx = 3, MODx = 0
RSELx = 8, DCOx = 3, MODx = 0
RSELx = 9, DCOx = 3, MODx = 0
RSELx = 10, DCOx = 3, MODx = 0
RSELx = 11, DCOx = 3, MODx = 0
RSELx = 12, DCOx = 3, MODx = 0
RSELx = 13, DCOx = 3, MODx = 0
RSELx = 14, DCOx = 3, MODx = 0
RSELx = 15, DCOx = 3, MODx = 0
RSELx = 15, DCOx = 7, MODx = 0
S_RSEL = f_{DCO(RSEL+1,DCO)}/f_{DCO(RSEL,DCO)}
VCC
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
3V
3V
2.2 V/3 V
MIN TYP MAX UNIT
1.8
3.6
2.2
3.6 V
3.0
3.6
0.06
0.14 MHz
0.07
0.17 MHz
0.10
0.20 MHz
0.14
0.28 MHz
0.20
0.40 MHz
0.28
0.54 MHz
0.39
0.77 MHz
0.54
1.06 MHz
0.80
1.50 MHz
1.10
2.10 MHz
1.60
3.00 MHz
2.50
4.30 MHz
3.00
5.50 MHz
4.30
7.30 MHz
6.00
9.60 MHz
8.60
13.9 MHz
12.0
18.5 MHz
16.0
26.0 MHz
1.55 ratio
S_DCO
Frequency step between
tap DCO and DCO+1
S_DCO = f_{DCO(RSEL,DCO+1)}/f_{DCO(RSEL,DCO)}
2.2 V/3 V
1.05 1.08 1.12 ratio
Duty cycle
Measured at P1.4/SMCLK
2.2 V/3 V
40
50
60 %
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