MSP430FR5994 Datasheet, PDF (34/166 Pages) Texas Instruments – Mixed-Signal Microcontrollers

MSP430FR5994, MSP430FR59941, MSP430FR5992, MSP430FR5964, MSP430FR5962
SLASE54 – MARCH 2016
www.ti.com
5.11 Timing and Switching Characteristics
5.11.1 Power Supply Sequencing
TI recommends powering AVCC and DVCC pins from the same source. At a minimum, during power up,
power down, and device operation, the voltage difference between AVCC and DVCC must not exceed the
limits specified in Absolute Maximum Ratings. Exceeding the specified limits may cause malfunction of the
device including erroneous writes to RAM and FRAM.
Table 5-1 lists the power ramp requirements.
Table 5-1. Brownout and Device Reset Power Ramp Requirements
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
V_{VCC_BOR–}
V_{VCC_BOR+}
PARAMETER
Brownout power-down level⁽¹⁾
Brownout power-up level⁽¹⁾
TEST CONDITIONS
| dDV_CC/d_t | < 3 V/s
| dDV_CC/d_t | < 3 V/s⁽²⁾
MIN MAX UNIT
0.73 1.66 V
0.79 1.75 V
(1) Fast supply voltage changes can trigger a BOR reset even within the recommended supply voltage range. To avoid unwanted BOR
resets, the supply voltage must change by less than 0.05 V per microsecond (±0.05 V/µs). Following the data sheet recommendation for
capacitor C_DVCC should limit the slopes accordingly.
(2) The brownout levels are measured with a slowly changing supply.
Table 5-2 lists the supply voltage supervisor characteristics.
Table 5-2. SVS
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
I_SVSH,LPM
V_SVSH-
V_SVSH+
V_{SVSH_hys}
t_{PD,SVSH, AM}
SVS_H current consumption, low power modes
SVS_H power-down level
SVS_H power-up level
SVS_H hysteresis
SVS_H propagation delay, active mode
dV_Vcc/dt = –10 mV/µs
170
1.75
1.80
1.77
1.88
40
MAX
300
1.85
1.99
150
10
UNIT
nA
V
V
mV
µs
34
Specifications
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