Texas Instruments IC MCU 16B MSP430G2131IPW14 TSSOP-14 TID MSP430G2131IPW14 Datenbogen
Produktcode
MSP430G2131IPW14
DCO(RSEL,DCO+1)
DCO(RSEL,DCO)
average
DCO(RSEL,DCO)
DCO(RSEL,DCO+1)
32 × f
× f
f
=
MOD × f
+ (32 – MOD) × f
MSP430G2x31
MSP430G2x21
MSP430G2x21
SLAS694J – FEBRUARY 2010 – REVISED FEBRUARY 2013
Main DCO Characteristics
•
All ranges selected by RSELx overlap with RSELx + 1: RSELx = 0 overlaps RSELx = 1, ... RSELx = 14
overlaps RSELx = 15.
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:
DCO Frequency
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
MIN
TYP
MAX
UNIT
RSELx < 14
1.8
3.6
V
V
CC
Supply voltage
RSELx = 14
2.2
3.6
V
RSELx = 15
3
3.6
V
f
DCO(0,0)
DCO frequency (0, 0)
RSELx = 0, DCOx = 0, MODx = 0
3 V
0.06
0.14
MHz
f
DCO(0,3)
DCO frequency (0, 3)
RSELx = 0, DCOx = 3, MODx = 0
3 V
0.12
MHz
f
DCO(1,3)
DCO frequency (1, 3)
RSELx = 1, DCOx = 3, MODx = 0
3 V
0.15
MHz
f
DCO(2,3)
DCO frequency (2, 3)
RSELx = 2, DCOx = 3, MODx = 0
3 V
0.21
MHz
f
DCO(3,3)
DCO frequency (3, 3)
RSELx = 3, DCOx = 3, MODx = 0
3 V
0.30
MHz
f
DCO(4,3)
DCO frequency (4, 3)
RSELx = 4, DCOx = 3, MODx = 0
3 V
0.41
MHz
f
DCO(5,3)
DCO frequency (5, 3)
RSELx = 5, DCOx = 3, MODx = 0
3 V
0.58
MHz
f
DCO(6,3)
DCO frequency (6, 3)
RSELx = 6, DCOx = 3, MODx = 0
3 V
0.80
MHz
f
DCO(7,3)
DCO frequency (7, 3)
RSELx = 7, DCOx = 3, MODx = 0
3 V
0.8
1.5
MHz
f
DCO(8,3)
DCO frequency (8, 3)
RSELx = 8, DCOx = 3, MODx = 0
3 V
1.6
MHz
f
DCO(9,3)
DCO frequency (9, 3)
RSELx = 9, DCOx = 3, MODx = 0
3 V
2.3
MHz
f
DCO(10,3)
DCO frequency (10, 3)
RSELx = 10, DCOx = 3, MODx = 0
3 V
3.4
MHz
f
DCO(11,3)
DCO frequency (11, 3)
RSELx = 11, DCOx = 3, MODx = 0
3 V
4.25
MHz
f
DCO(12,3)
DCO frequency (12, 3)
RSELx = 12, DCOx = 3, MODx = 0
3 V
4.3
7.3
MHz
f
DCO(13,3)
DCO frequency (13, 3)
RSELx = 13, DCOx = 3, MODx = 0
3 V
7.8
MHz
f
DCO(14,3)
DCO frequency (14, 3)
RSELx = 14, DCOx = 3, MODx = 0
3 V
8.6
13.9
MHz
f
DCO(15,3)
DCO frequency (15, 3)
RSELx = 15, DCOx = 3, MODx = 0
3 V
15.25
MHz
f
DCO(15,7)
DCO frequency (15, 7)
RSELx = 15, DCOx = 7, MODx = 0
3 V
21
MHz
Frequency step between
S
RSEL
S
RSEL
= f
DCO(RSEL+1,DCO)
/f
DCO(RSEL,DCO)
3 V
1.35
ratio
range RSEL and RSEL+1
Frequency step between
S
DCO
S
DCO
= f
DCO(RSEL,DCO+1)
/f
DCO(RSEL,DCO)
3 V
1.08
ratio
tap DCO and DCO+1
Duty cycle
Measured at SMCLK output
3 V
50
%
Copyright © 2010–2013, Texas Instruments Incorporated
23