MSP430F643 Datasheet, PDF (56/106 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F643x
SLAS720B – AUGUST 2010 – REVISED AUGUST 2012
www.ti.com
Battery Backup
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
I_VBAT
VBAT = 1.7 V,
DVCC not connected,
RTC running
Current into VBAT terminal in VBAT = 2.2 V,
case no primary battery is DVCC not connected,
connected.
RTC running
VBAT = 3 V,
DVCC not connected,
RTC running
T_A = -40°C
T_A = 25°C
T_A = 60°C
T_A = 85°C
T_A = -40°C
T_A = 25°C
T_A = 60°C
T_A = 85°C
T_A = -40°C
T_A = 25°C
T_A = 60°C
T_A = 85°C
General
V_SWITCH
Switch-over level (V_CC to
VBAT)
C_VCC = 4.7 µF
SVSHRL = 0
SVSHRL = 1
SVSHRL = 2
SVSHRL = 3
R_{ON_VBAT}
On-resistance of switch
between VBAT and VBAK
V_BAT = 1.8 V
V_BAT3
t_Sample,VBA
T3
V_CHVx
VBAT to ADC input channel
12:
V_BAT divide,
V_BAT3 ≠ V_BAT /3
VBAT to ADC: Sampling time
required if VBAT3 selected
ADC12ON = 1,
Error of conversion result ≤ 1 LSB
Charger end voltage
CHVx = 2
CHCx = 1
R_CHARGE Charge limiting resistor
CHCx = 2
CHCx = 3
V_CC
0V
1.8 V
3V
3.6 V
MIN
1.59
1.79
1.98
2.10
1000
2.65
TYP
0.43
0.52
0.58
0.64
0.50
0.59
0.64
0.71
0.68
0.75
0.79
0.86
V_{SVSH_IT-}
0.35
0.6
1.0
1.2
2.7
MAX UNIT
µA
µA
µA
1.69
1.91 V
2.11
2.23
1 _kΩ
±5%
±5% V
±5%
ns
2.9 V
5
10 kΩ
20
USCI (UART Mode)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
f_USCI
PARAMETER
USCI input clock frequency
TEST CONDITIONS
Internal: SMCLK, ACLK
External: UCLK
Duty cycle = 50% ± 10%
V_CC
MIN TYP MAX UNIT
f_SYSTEM MHz
f_BITCLK
BITCLK clock frequency
(equals baud rate in MBaud)
1 MHz
t_τ
UART receive deglitch time⁽¹⁾
2.2 V
50
3V
50
600
ns
600
(1) Pulses on the UART receive input (UCxRX) shorter than the UART receive deglitch time are suppressed. To ensure that pulses are
correctly recognized their width should exceed the maximum specification of the deglitch time.
56
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