MSP430F2618-EP Datasheet, PDF (37/92 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F2618- EP
MIXED SIGNAL MICROCONTROLLER
SLAS632 -- DECEMBER 2008
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
PARAMETER
TEST CONDITIONS
RSELx < 14
V_CC
MIN
1.8
V_CC
Supply voltage
RSELx = 14
2.2
RSELx = 15
3.0
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
DCO frequency (0, 0)
RSELx = 0, DCOx = 0, MODx = 0
2.2 V/3 V
0.06
DCO frequency (0, 3)
RSELx = 0, DCOx = 3, MODx = 0
2.2 V/3 V
0.07
DCO frequency (1, 3)
RSELx = 1, DCOx = 3, MODx = 0
2.2 V/3 V
0.10
DCO frequency (2, 3)
RSELx = 2, DCOx = 3, MODx = 0
2.2 V/3 V
0.14
DCO frequency (3, 3)
RSELx = 3, DCOx = 3, MODx = 0
2.2 V/3 V
0.20
DCO frequency (4, 3)
RSELx = 4, DCOx = 3, MODx = 0
2.2 V/3 V
0.28
DCO frequency (5, 3)
RSELx = 5, DCOx = 3, MODx = 0
2.2 V/3 V
0.39
DCO frequency (6, 3)
RSELx = 6, DCOx = 3, MODx = 0
2.2 V/3 V
0.54
DCO frequency (7, 3)
RSELx = 7, DCOx = 3, MODx = 0
2.2 V/3 V
0.80
DCO frequency (8, 3)
RSELx = 8, DCOx = 3, MODx = 0
2.2 V/3 V
1.10
DCO frequency (9, 3)
RSELx = 9, DCOx = 3, MODx = 0
2.2 V/3 V
1.60
DCO frequency (10, 3) RSELx = 10, DCOx = 3, MODx = 0
2.2 V/3 V
2.50
DCO frequency (11, 3) RSELx = 11, DCOx = 3, MODx = 0
2.2 V/3 V
3.00
DCO frequency (12, 3) RSELx = 12, DCOx = 3, MODx = 0
2.2 V/3 V
4.30
DCO frequency (13, 3) RSELx = 13, DCOx = 3, MODx = 0
2.2 V/3 V
6.00
DCO frequency (14, 3) RSELx = 14, DCOx = 3, MODx = 0
2.2 V/3 V
8.60
DCO frequency (15, 3) RSELx = 15, DCOx = 3, MODx = 0
3V
12.0
DCO frequency (15, 7) RSELx = 15, DCOx = 7, MODx = 0
3V
16.0
Frequency step between
range RSEL and RSEL+1
S_RSEL = f_{DCO(RSEL+1,DCO)}/f_{DCO(RSEL,DCO)}
2.2 V/3 V
TYP MAX UNIT
3.6
3.6 V
3.6
0.14 MHz
0.17 MHz
0.20 MHz
0.28 MHz
0.40 MHz
0.54 MHz
0.77 MHz
1.06 MHz
1.50 MHz
2.10 MHz
3.00 MHz
4.30 MHz
5.50 MHz
7.30 MHz
9.60 MHz
13.9 MHz
18.5 MHz
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 %
 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
37