MSP430X15X Datasheet, PDF (32/73 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430x15x, MSP430x16x, MSP430x161x
MIXED SIGNAL MICROCONTROLLER
SLAS368E − OCTOBER 2002 − REVISED AUGUST 2006
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
POR/brownout reset (BOR) (see Notes 1 and 2)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
t_d(BOR)
2000 μs
V_CC(Start)
dV_CC/dt ≤ 3 V/s (see Figure 10)
0.7 × V_{(B_IT−)}
V
V_{(B_IT−)}
V_{hys(B_IT−)}
Brownout
dV_CC/dt ≤ 3 V/s (see Figure 10 through Figure 12)
dV_CC/dt ≤ 3 V/s (see Figure 10)
1.71
V
70
130
180 mV
t_(reset)
Pulse length needed at RST/NMI pin to accepted reset internally,
V_CC = 2.2 V/3 V
2
μs
NOTES:
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_BOR(delay) 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. See the MSP430x1xx Family User’s Guide (SLAU049) for more information on the brownout/SVS circuit.
typical characteristics
VCC
Vhys(B_IT−)
V(B_IT−)
V_CC(Start)
BOR
1
0
t _d(BOR)
Figure 10. POR/Brownout Reset (BOR) vs Supply Voltage
32
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265