msp430f2121irge Microchip Technology Inc., msp430f2121irge Datasheet - Page 21

• Manufacturer Part Number: msp430f2121irge
• Description: Msp430
• Manufacturer: Microchip Technology Inc.

electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
main DCO characteristics
DCO frequency
Vcc
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
S DCO
Duty Cycle
D
D
D
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
Modulation control bits MODx select how often f
cycles. The frequency f
to:
PARAMETER
Supply voltage range
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
Frequency step between
tap DCO and DCO+1
f
average
DCO(RSEL,DCO)
+
MOD
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)
S DCO =
f DCO(RSEL,DCO+1) /f DCO(RSEL,DCO)
Measured at P1.4/SMCLK
POST OFFICE BOX 655303
32
f
TEST CONDITIONS
DCO(RSEL,DCO)
is used for the remaining cycles. The frequency is an average equal
f
DCO(RSEL,DCO)
DCO(RSEL,DCO+1)
•
)(32*MOD)
DALLAS, TEXAS 75265
f
DCO(RSEL,DCO)1)
MIXED SIGNAL MICROCONTROLLER
SLAS439C − SEPTEMBER 2004 − REVISED JULY 2006
is used within the period of 32 DCOCLK
f
DCO(RSEL,DCO)1)
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
2.2 V/3 V
2.2 V/3 V
2.2 V/3 V
DCO
VCC
3 V
3 V
.
MIN
0.06
0.07
0.10
0.14
0.20
0.28
0.39
0.54
0.80
1.10
1.60
2.50
3.00
4.30
6.00
8.60
12.0
16.0
1.05
1.8
2.2
3.0
40
TYP
1.08
MSP430x21x1
50
MAX
0.14
0.17
0.20
0.28
0.40
0.54
0.77
1.06
1.50
2.10
3.00
4.30
5.50
7.30
9.60
13.9
18.5
26.0
1.55
1.12
3.6
3.6
3.6
60
UNIT
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
ratio
ratio
%
V
V
V
21