MSP430F2274-EP_14 Datasheet, PDF (26/81 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F2274-EP
SLAS614D – SEPTEMBER 2008 – REVISED MAY 2011
www.ti.com
Main DCO Characteristics
• All ranges selected by RSELx overlap with RSELx + 1: RSELx = 0 overlaps RSELx = 1, ... RSELx = 14
overlaps RSELx = 15.
• DCO control bits DCOx have a step size as defined by parameter S_DCO.
• 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 – Electrical Characteristics
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
RSELx < 14
T_A
V_CC
MIN TYP MAX
–55°C to 125°C
1.8
3.6
V_CC
Supply voltage range RSELx = 14
RSELx = 15
–55°C to 125°C
–55°C to 125°C
2.2
3.6
3.0
3.6
f_DCO(0,0)
DCO frequency (0, 0)
RSELx = 0, DCOx = 0,
MODx = 0
–55°C to 125°C
2.2 V/3 V
0.06
0.14
f_DCO(0,3)
DCO frequency (0, 3)
RSELx = 0, DCOx = 3,
MODx = 0
–55°C to 125°C
2.2 V/3 V
0.07
0.17
f_DCO(1,3)
DCO frequency (1, 3)
RSELx = 1, DCOx = 3,
MODx = 0
–55°C to 125°C
2.2 V/3 V
0.10
0.20
f_DCO(2,3)
DCO frequency (2, 3)
RSELx = 2, DCOx = 3,
MODx = 0
–55°C to 125°C
2.2 V/3 V
0.14
0.28
f_DCO(3,3)
DCO frequency (3, 3)
RSELx = 3, DCOx = 3,
MODx = 0
–55°C to 125°C
2.2 V/3 V
0.20
0.40
f_DCO(4,3)
DCO frequency (4, 3)
RSELx = 4, DCOx = 3,
MODx = 0
–55°C to 125°C
2.2 V/3 V
0.28
0.54
f_DCO(5,3)
DCO frequency (5, 3)
RSELx = 5, DCOx = 3,
MODx = 0
–55°C to 125°C
2.2 V/3 V
0.39
0.77
f_DCO(6,3)
DCO frequency (6, 3)
RSELx = 6, DCOx = 3,
MODx = 0
–55°C to 125°C
2.2 V/3 V
0.54
1.06
f_DCO(7,3)
DCO frequency (7, 3)
RSELx = 7, DCOx = 3,
MODx = 0
–55°C to 125°C
2.2 V/3 V
0.80
1.50
f_DCO(8,3)
DCO frequency (8, 3)
RSELx = 8, DCOx = 3,
MODx = 0
–55°C to 125°C
2.2 V/3 V
1.10
2.10
f_DCO(9,3)
DCO frequency (9, 3)
RSELx = 9, DCOx = 3,
MODx = 0
–55°C to 125°C
2.2 V/3 V
1.60
3.00
f_DCO(10,3)
DCO frequency (10, 3)
RSELx = 10, DCOx = 3,
MODx = 0
–55°C to 125°C
2.2 V/3 V
2.50
4.30
f_DCO(11,3)
DCO frequency (11, 3)
RSELx = 11, DCOx = 3,
MODx = 0
–55°C to 125°C
2.2 V/3 V
3.00
5.50
f_DCO(12,3)
DCO frequency (12, 3)
RSELx = 12, DCOx = 3,
MODx = 0
–55°C to 125°C
2.2 V/3 V
4.30
7.30
f_DCO(13,3)
DCO frequency (13, 3)
RSELx = 13, DCOx = 3,
MODx = 0
–55°C to 125°C
2.2 V/3 V
6.00
9.60
f_DCO(14,3)
DCO frequency (14, 3)
RSELx = 14, DCOx = 3,
MODx = 0
–55°C to 125°C
2.2 V/3 V
8.60
13.9
f_DCO(15,3)
DCO frequency (15, 3)
RSELx = 15, DCOx = 3,
MODx = 0
–55°C to 125°C
3V
12.0
18.5
f_DCO(15,7)
DCO frequency (15, 7)
RSELx = 15, DCOx = 7,
MODx = 0
–55°C to 125°C
3V
16.0
26.0
S_RSEL
Frequency step
between range RSEL
and RSEL+1
S_RSEL =
f_{DCO(RSEL+1,DCO)}/f_{DCO(RSEL,DCO)}
–55°C to 125°C
2.2 V/3 V
1.55
UNIT
V
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
M Hz
MHz
MHz
MHz
MHz
ratio
26
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