MSP430C11x1, MSP430F11x1A

MIXED SIGNAL MICROCONTROLLER

SLAS241H − SEPTEMBER 1999 − REVISED SEPTEMBER 2004

21

POST OFFICE BOX 655303

electrical characteristics over recommended ranges of supply voltage and operating free-air

temperature (unless otherwise noted) (continued)

PUC/POR

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

t(POR_Delay)

Internal time delay to release POR

150

250

µs

VCC threshold at which POR

TA = −40°C

1.4

1.8

V

VPOR

VCC threshold at which POR

release delay time begins

(see Note 1)

TA = 25°C

1.1

1.5

V

VPOR

release delay time begins

(see Note 1)

TA = 85°C

VCC = 2.2 V/3 V

0.8

1.2

V

V(min)

VCC threshold required to

generate a POR (see Note 2)

VCC |dV/dt| ≥ 1V/ms

CC

0.2

V

t(reset)

RST/NMI low time for PUC/POR

Reset is accepted internally

2

µs

NOTES:

1. VCC rise time dV/dt ≥ 1V/ms.

2. When driving VCC low in order to generate a POR condition, VCC should be driven to 200mV or lower with a dV/dt equal to or less

than −1V/ms. The corresponding rising VCC must also meet the dV/dt requirement equal to or greater than +1V/ms.

VCC

POR

V

t

V

POR

V

(min)

POR

No POR

Figure 10. Power-On Reset (POR) vs Supply Voltage

0

0.2

0.6

1.0

1.2

1.8

2.0

−40

−20

0

20

40

60

80

Temperature [

°C]

1.6

1.4

0.8

0.4

1.2

1.5

1.8

0.8

1.1

1.4

25

°C

Max

Min