參數(shù)資料
型號(hào)： MSP430P315S
廠商： Texas Instruments, Inc.
英文描述： MIXED SIGNAL MICROCONTROLLERS
中文描述： 混合信號(hào)微處理器
文件頁(yè)數(shù)： 37/70頁(yè)
文件大?。?/td> 1176K
代理商： MSP430P315S
SLAS368D
OCTOBER 2002
REVISED MARCH 2005
37
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
main DCO characteristics
Individual devices have a minimum and maximum operation frequency. The specified parameters for
f
(
DCOx0)
to f
(
DCOx7)
are valid for all devices.
All ranges selected by Rsel(n) overlap with Rsel(n+1): Rsel0 overlaps Rsel1, ... Rsel6 overlaps Rsel7.
DCO control bits DCO0, DCO1, and DCO2 have a step size as defined by parameter S
DCO
.
Modulation control bits MOD0 to MOD4 select how often f
(
DCO+1)
is used within the period of 32 DCOCLK
cycles. The frequency f
(DCO)
is used for the remaining cycles. The frequency is an average equal to:
DCO when using R
OSC
(see Note 1)
PARAMETER
TEST CONDITIONS
V
CC
MIN
NOM
MAX
UNIT
MHz
MHz
R
= 4, DCO = 3, MOD = 0, DCOR = 1,
sel
T
A
= 25
°
C
2.2 V
3 V
1.8
±
15%
1.95
±
15%
f
DCO
, DCO output frequency
D
t
, Temperature drift
D
v
, Drift with V
CC
variation
NOTES:
1. R
OSC
= 100k
. Metal film resistor, type 0257. 0.6 watt with 1% tolerance and T
K
=
±
50ppm/
°
C.
crystal oscillator, LFXT1 oscillator (see Note 1)
R
sel
= 4, DCO = 3, MOD = 0, DCOR = 1
R
sel
= 4, DCO = 3, MOD = 0, DCOR = 1
2.2 V/3 V
±
0.1
10
%/
°
C
%/V
2.2 V/3 V
PARAMETER
TEST CONDITIONS
MIN
NOM
MAX
UNIT
XTS=0; LF oscillator selected, V
CC
= 2.2 V/3 V
XTS=1; XT1 oscillator selected, V
CC
= 2.2 V/3 V
XTS=0; LF oscillator selected, V
CC
= 2.2 V/3 V
XTS=1; XT1 oscillator selected, V
CC
= 2.2 V/3 V
12
2
C
XIN
Integrated input capacitance
pF
12
C
XOUT
Integrated output capacitance
2
pF
V
IL
V
= 2.2 V/3 V
CC
(see Note 2)
XTS = 0 or 1
XT1 or LF modes
V
SS
0.2
×
V
CC
Input levels at XIN
XTS = 0, LF mode
0.9
×
V
CC
0.8
×
V
CC
V
CC
V
CC
V
V
IH
XTS = 1, XT1 mode
NOTES:
1. The oscillator needs capacitors at both terminals, with values specified by the crystal manufacturer.
2. Applies only when using an external logic-level clock source. Not applicable when using a crystal or resonator.
crystal oscillator, XT2 oscillator (see Note 1)
PARAMETER
TEST CONDITIONS
MIN
NOM
MAX
UNIT
C
XIN
C
XOUT
V
IL
V
IH
NOTES:
Integrated input capacitance
V
CC
= 2.2 V/3 V
V
CC
= 2.2 V/3 V
2
pF
Integrated output capacitance
2
pF
V
SS
0.2
×
V
CC
V
CC
V
V
Input levels at XIN
V
CC
= 2.2 V/3 V (see Note 2)
0.8
×
V
CC
1. The oscillator needs capacitors at both terminals, with values specified by the crystal manufacturer.
2. Applies only when using an external logic-level clock source. Not applicable when using a crystal or resonator.
USART0, USART1 (see Note 1)
PARAMETER
TEST CONDITIONS
MIN
200
150
NOM
430
280
MAX
800
500
UNIT
V
CC
= 2.2 V
V
CC
= 3 V
t
(
τ
)
USART0/USART1: deglitch time
ns
NOTE 1: The signal applied to the USART0/USART1 receive signal/terminal (URXD0/1) should meet the timing requirements of t
(τ
)
to ensure
that the URXS flip-flop is set. The URXS flip-flop is set with negative pulses meeting the minimum-timing condition of t
(τ
)
. The operating
conditions to set the flag must be met independently from this timing constraint. The deglitch circuitry is active only on negative
transitions on the URXD0/1 line.
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