MSP430F23X0 Datasheet, PDF (24/67 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430F23x0
SLAS518E – AUGUST 2006 – REVISED AUGUST 2011
www.ti.com
POR/Brownout Reset (BOR)⁽¹⁾⁽²⁾
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
V_CC(start)
V_{(B_IT-)}
V_{hys(B_IT-)}
t_d(BOR)
t_(reset)
PARAMETER
TEST CONDITIONS
See Figure 8
See Figure 8 through Figure 10
See Figure 8
See Figure 8
Pulse length needed at RST/NMI pin
to accepted reset internally
dV_CC /dt ≤ 3 V/s
dV_CC /dt ≤ 3 V/s
dV_CC /dt ≤ 3 V/s
V_CC
MIN
TYP
0.7 ×
V_{(B_IT-)}
70
130
2.2 V/3 V
2
MAX UNIT
V
1.71 V
210 mV
2000 µs
µs
(1) The current consumption of the brownout module is already included in the I_CC current consumption data. The voltage level
V_{(B_IT-)} + V_{hys(B_IT-)} is ≤ 1.8 V.
(2) During power up, the CPU begins code execution following a period of t_d(BOR) after V_CC = V_{(B_IT-)} + V_{hys(B_IT-)}. The default DCO settings
must not be changed until V_CC ≥ V_CC(min), where V_CC(min) is the minimum supply voltage for the desired operating frequency.
VCC
Vhys(B_IT−)
V(B_IT−)
V_{CC(s t ar t )}
1
0
t _d(BOR)
Figure 8. POR/Brownout Reset (BOR) vs Supply Voltage
24
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