MSP430F1122 Datasheet, PDF (21/48 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430x11x2, MSP430x12x2
MIXED SIGNAL MICROCONTROLLER
SLAS361C − JANUARY 2002 − REVISED DECEMBER 2003
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
USART (see Note 1)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
t(_τ)
NOTES:
USART: deglitch time
VCC = 2.2 V
VCC = 3 V
200 430
150 280
800
ns
500
1. The signal applied to the USART receive signal/terminal (URXD) 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 URXD line.
RAM
PARAMETER
MIN NOM MAX UNIT
V(RAMh) CPU halted (see Note 1)
1.6
V
NOTES: 1. This parameter defines the minimum supply voltage VCC when the data in the program memory RAM remains unchanged. No
program execution should happen during this supply voltage condition.
POR brownout, reset (see Notes 1 and 2)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
td(BOR)
2000 µs
VCC(start)
dVCC/dt ≤ 3 V/s
0.7 × V(B_IT−)
V
V(B_IT−)
Vhys(B_IT−)
Brownout
dVCC/dt ≤ 3 V/s
dVCC/dt ≤ 3 V/s
70
130
1.71 V
180 mV
t(reset)
Pulse length needed at RST/NMI pin to accepted reset internally,
VCC = 2.2 V/3 V
2
µs
NOTES:
1. The current consumption of the brown-out module is already included in the ICC current consumption data.
2. During power up, the CPU begins code execution following a period of td(BOR) after VCC = V(B_IT−) + Vhys(B_IT−).
The default DCO settings must not be changed until VCC ≥ VCC(min). See the MSP430x1xx Family User’s Guide for more
information on the brownout circuit.
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